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F-117A Stealth Fighter Retired

zonker writes "Nearly 30 years ago Lockheed Martin's elite Skunk Works team developed what would become the F-117A Nighthawk Stealth Fighter. A few of their earlier projects include the SR-71 Blackbird and U2 Dragon Lady spy planes. Today is the last for the Stealth Fighter, which is being replaced by the F-22 Raptor (another Skunk Works project)."

106 of 476 comments (clear)

  1. Fuel leaking SR-71's by LM741N · · Score: 3, Interesting

    I understand that the SR-71's leaked fuel until they got up high enough so that the vacuum pressed everything together tightly. But speaking of engines, how did they keep the fuel from igniting from the engine while it was leaking?

    1. Re:Fuel leaking SR-71's by Z00L00K · · Score: 4, Informative

      No - it wasn't the vacuum it was the heat from the drag caused by the supersonic speed that heated the plane enough to stop the leaks.

      --
      If builders built buildings the way programmers wrote programs, then the first woodpecker would destroy civilization.
    2. Re:Fuel leaking SR-71's by Thelasko · · Score: 4, Informative

      They leaked fuel until the heat caused by friction (like on the space shuttle) made the panels fit together by thermal expansion. The fuel was also very difficult to ignite.

      --
      One of our competitors trademarked the term "hypothesis". From now on, we will call them "boneheaded ideas".
    3. Re:Fuel leaking SR-71's by mhall119 · · Score: 2, Interesting

      This is slashdot, so someone has to point it out. The shuttle experiences heating from ram pressure, not friction.

      See also: http://en.wikipedia.org/wiki/Space_shuttle_thermal_protection_system

      --
      http://www.mhall119.com
    4. Re:Fuel leaking SR-71's by UnknowingFool · · Score: 4, Interesting

      Also the SR-71 would have only just enough fuel to take off and revendevous with a jet tanker as soon as possible.

      --
      Well, there's spam egg sausage and spam, that's not got much spam in it.
    5. Re:Fuel leaking SR-71's by Frosty+Piss · · Score: 5, Interesting

      But speaking of engines, how did they keep the fuel from igniting from the engine while it was leaking?
      I was stationed at Beale and spent many nights on standby while they fueled the Blackbird. Its fuel is almost impossible to ignite without the catalyst tetraethylborane (TEB), which ignites on contact with air. There where often pools of fuel under the plane when they sat in the hangars for a few days.

      The thing that I always thought amazing at the time I worked with them was that the avionics seemed so outdated in an age where most older airframes where being fitted with glass. Lot's of round gages and such.

      --
      If you want news from today, you have to come back tomorrow.
    6. Re:Fuel leaking SR-71's by sootman · · Score: 5, Interesting
      And AFAIK, that was by design. They knew it would expand, so they took advantage of that and optimized the plane for flight, rather than sitting on the ground, which makes sense to me. From http://en.wikipedia.org/wiki/SR-71#Fuselage

      To allow for thermal expansion at the high operational temperatures the fuselage panels were manufactured to fit only loosely on the ground. Proper alignment was only achieved when the airframe warmed up due to air resistance at high speeds, causing the airframe to expand several inches. Because of this, and the lack of a fuel sealing system that could handle the extreme temperatures, the aircraft would leak JP-7 jet fuel onto the runway before it took off. The aircraft would quickly make a short sprint, meant to warm up the airframe, and was then refueled in the air before departing on its mission... On landing after a mission the canopy temperature was over 300 C, too hot to approach.
      I could read about the SR-71 all day long. That thing was a freaking marvel in every sense of the word and there are a million neat details about it, and it's amazing to consider that it was built in the early 60s. One little tidbit you'll often hear (so it must be true ;-) ) -- "if a surface-to-air missile launch were detected, standard evasive action was simply to accelerate and climb." The freaking thing officially flew across the country in 68 minutes.
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    7. Re:Fuel leaking SR-71's by Anonymous Coward · · Score: 3, Informative

      Because jet fuel does not combust as easily as the government cover-up of the shooting of Flight 800 would like you to believe. ;-) Liquid fuel, be it jet fuel or simply gasoline is very hard to get to burn. Fuel Vapor of either of these however, is extremely east to ignite... and that, as I recall was the problem with flight 800. That the forward fuel tank was empty. Meaning it was full of fumes, and thus highly volatile.
    8. Re:Fuel leaking SR-71's by DAtkins · · Score: 4, Informative

      There was an episode of Mythbusters which, while not directly related, did show that diesel and jet fuel would not ignite even under a plumbers blowtorch.

      As always, it's the air/fuel mixture that's the important part. This does not hold for gasoline, which gives off vapors quite nicely, thank you.

    9. Re:Fuel leaking SR-71's by MightyYar · · Score: 2, Informative

      I heard of stories where the had the fuel in an open container and would drop a lighted match in it, the fuel would not ignite. Well, since that's true of plain-old kerosene, I don't doubt it for exotic blends of jet fuel.
      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
    10. Re:Fuel leaking SR-71's by MightyYar · · Score: 2, Informative

      Jet fuel VAPOR, on the other hand...

      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
    11. Re:Fuel leaking SR-71's by RoninOtter · · Score: 2, Informative

      Actually it's because the SR-71 doesn't use normal Jet Fuel. Typical fuel for large jet engines is US Jet A1 which is a kerosene-based fuel and it is very flammable. The Blackbird's engines used something called JP7 which has a very high flash point. You can actually drop a lit match into a bucket of JP7 and the match will simply go out.

      In order to get ignition to start the engines initially, an additive chemical needed to be used to get the fuel's flash point temporarily lowered.

      And don't get me started on the "Pierre Salinger Syndrome."

    12. Re:Fuel leaking SR-71's by Stanistani · · Score: 4, Informative

      So, post your evidence.

      We've seen that if you have three feds in a conspiracy, one will blab to the Washington Post, so... name your source.

      . . .

      I suspect I'll be waiting a long time.

      The center tank on TWA Flight 800 was almost empty, overheated and full of fumes, and likely a spark from a poorly wired fuel sensor detonated it.

      Oh, if you were kidding, it wasn't funny, emoticon or no.

    13. Re:Fuel leaking SR-71's by ahabswhale · · Score: 5, Interesting

      I used to be in the Air Force and had the pleasure to watch these things launch. They took off with full afterburners and the entire base would shake from the roar of the engines. Blue flame rings would shoot many feet out the back of the engines. Watching the SR-71 take off was the most amazing thing I've ever seen and I would always stop to watch it. Others who had been in the AF over a dozen years would stop too even though they've seen it launch hundreds of times. Just an incredible and inspiring plane.

      You always knew when they were going to launch one because they would start sending out tankers (3 to 4) a good hour or so before they launched the Blackbird.

      --
      Are agnostics skeptical of unicorns too?
    14. Re:Fuel leaking SR-71's by tygt · · Score: 2, Informative
      The fuel was almost impossible to ignite; it took some really nasty explosive chemical to start the burners (from http://en.wikipedia.org/wiki/SR71):

      JP-7 is very slippery and extremely difficult to light in any conventional way. The slipperiness was a disadvantage on the ground, since the aircraft leaked fuel when not flying, but at least JP-7 was not a fire hazard. When the engines of the aircraft were started, puffs of tetraethylborane (TEB), which ignites on contact with air, were injected into the engines to produce temperatures high enough to initially ignite the JP-7.

      Presumably the temperatures were only present in the engines, so the exhaust itself wasn't hot enough to catch any leakage on fire once the engines were going.
    15. Re:Fuel leaking SR-71's by MightyYar · · Score: 2, Funny

      That would probably work. But throwing the undead into a vat of kerosene and lighting the vat would not. :)

      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
    16. Re:Fuel leaking SR-71's by pato101 · · Score: 3, Insightful

      Please don't try it!
      Of course, at a very hot day *perhaps* you can do it because there is so much amount of gasoline evaporated that the fuel/oxygen ratio is bigger than the required for a combustion; but do not play ever with gasoline!!!.

    17. Re:Fuel leaking SR-71's by DynaSoar · · Score: 5, Interesting

      Also the SR-71 would have only just enough fuel to take off and revendevous with a jet tanker as soon as possible. A loaded B-52 certainly had to, but the SR-71 didn't necessarily have this profile. The only one I ever saw up close took off from our SAC base without a tanker going along. That's not to say there wasn't a tanker up there (there was another SAC base with tankers only 200 miles away).

      More curious to me was the fact that the one we refueled had two LOX tanks, contrary to the manual's statement of only one. It had the normal one under the cockpit, and a second one in the airframe between the wings/engines. I surmise the second was a propulsion system oxidizer. The JP-7 fuel being a kerosene, the combination with LOX would have given it the propulsion profile of rocket motors being used from 1945 on. As a constantly afterburning ramjet at speed, the engines could have easily been adapted to do this.

      And frankly I don't recall the one we loaded as having leaked, from hoses-on to taxi-out.
      --
      "I may be synthetic, but I'm not stupid." -- Bishop 341-B
    18. Re:Fuel leaking SR-71's by Stanistani · · Score: 2, Insightful

      It works like this for the airline industry, or it did until 9-11 changed the paradigm:
      If terrorism => mechanical failure
      If mechanical failure => pilot error. . . Spoken by someone who's never read an NTSB report.

      ... My aunt had a friend who... The plural of anecdote is not data.

      I see no cited sources.

      . . .

      Can we move on to something more substantive, such as your evidence for the existence of Santa Claus?

      The error made in the TWA 800 investigation was that the government assumed it was a missile strike, and made knee-jerk changes in airport security because of this assumption. When the evidence for a missile strike proved non-existent, they had to start from scratch. People jumped on the explanation, and then tried to turn it around on the government (The U. S. Navy shot it down!).

      Remember Pierre Salinger?
    19. Re:Fuel leaking SR-71's by pato101 · · Score: 4, Informative

      You are both right and wrong. I'll try to clarify. The heat transfer between a fluid and a solid wall happens a the viscous zone so called boundary layer, where friction happens. On the other hand, the temperature which modulates this heat transfer is the external flow total temperature which is where viscous effects are negligible.
      The total temperature is given by the compressible isentropic flow behaviour:
      Tt/Tamb = 1+ (k-1)/k*M^2, where
      Tt is the total temperature in K or Rankine,
      Tamb is the ambient temperature in same units above,
      k is the heat coefficient ratio, for the air is 1.4 and
      M is the mach number.
      Thus, for a 3.5 Mach number, the maximum for SR-71, the total temperature is:
      Tt = Tamb*(1+0.29*3.5^2)=Tamb*4.5,
      and for a Tamb of -50 degrees celsius (-58 deg Fahrenheit), becomes,
      Tt = 223*4.5=1003K = 730 deg C = 1346 deg F

      At that speed, the ambient is sooooo hot! even when the atmosferic temperature may be soo freezing!!!!.
      At the leading edge of the SR-71 wings and the fuselage nose, you reach such temperature without any kind of viscous effects; just because you stagnate the flow isentropically there: you are more right than wrong at the end :P

    20. Re:Fuel leaking SR-71's by Deadstick · · Score: 2, Informative
      Likewise any high-speed aircraft. The temperature of a gas is simply a statistical measure of how fast its molecules are moving when they impact an object. Right now, you're sitting in the midst of lots and lots of N2 and O2 molecules that are bouncing around in the disordered manner that we call Brownian motion. Every time one of them hits you, it transfers a tiny amount of energy into the cell it hits. Turn up your thermostat and they'll bounce around faster; your skin will sense that it's being pounded on harder by those molecules, and you'll say it's getting hot. A thermometer will respond in exactly the same way.

      Now get yourself moving very fast, and any molecules that hit the front side of your body will have an ordered component of velocity added to the statistical disordered component you've been experiencing, and they'll hit you harder. Likewise, the ones hitting you from behind will hit less hard. You'll feel hotter in front and cooler on your butt. You haven't noticed it, because you've never been in enough wind to make a significant difference, but high-speed airplanes are a different story.

      Pressure is a related but different issue: it depends on the mass of the molecules and the frequency of impacts, in addition to the velocity. Friction is not an issue; the molecules heat the surface by bouncing off it, not by rubbing along it.

      If you get the chance, watch a Shuttle landing on one of the NASA feeds that shows the view from an infrared camera that gives a black-and-white image with brightness representing the temperatures. You'll see the nose and leading edges glowing white from the reentry heating: that's particle impacts at work. Then as it touches down, you'll see the tires light up like spotlights; that's friction at work.

      rj

    21. Re:Fuel leaking SR-71's by Deadstick · · Score: 2, Informative
      In order to get ignition to start the engines initially, an additive chemical needed to be used

      Triethyl borane.

      rj

    22. Re:Fuel leaking SR-71's by myth_of_sisyphus · · Score: 5, Funny

      A good SR-71 anecdote. From "Sled Driver"

              "One day, high above Arizona, we were monitoring the radio traffic of all the mortal airplanes below us. First, a Cessna pilot asked the air traffic controllers to check his ground speed. 'Ninety knots,' ATC replied. A twin Bonanza soon made the same request. 'One-twenty on the ground,' was the reply. To our surprise, a navy F-18 came over the radio with a ground speed check. I knew exactly what he was doing. Of course, he had a ground speed indicator in his cockpit, but he wanted to let all the bug-smashers in the valley know what real speed was. 'Dusty 52, we show you at 620 on the ground,' ATC responded.

              The situation was too ripe. I heard the click of Walter's mike button in the rear seat. In his most innocent voice, Walter startled the controller by asking for a ground speed check from 81,000 feet, clearly above controlled airspace. In a cool, professional voice, the controller replied, 'Aspen 20, I show you at 1,982 knots on the ground.' We did not hear another transmission on that frequency all the way to the coast."

    23. Re:Fuel leaking SR-71's by russotto · · Score: 3, Informative

      There's a reason the empty center tank is also called the "Pacific" tank.

    24. Re:Fuel leaking SR-71's by MrNiceguy_KS · · Score: 3, Interesting

      Midwesterners can see a retired Blackbird at the Kansas Cosmosphere in Hutchinson. If you're in Wichita, it's about 45 min away, and well worth the drive. They have a space museum that is absolutely amazing, including the Mercury "Liberty Bell" capsule and the largest collection of Soviet space program artifacts outside of the former USSR. I remember when they got the SR-71. They added a whole new entryway to accommodate it.

      --
      Redundancy is good And also good.
    25. Re:Fuel leaking SR-71's by jandrese · · Score: 3, Insightful

      Eh? Mythbusters did a followup of that death ray episode where they actually invited the professor and his students out from MIT to recreate the experiment in the actual conditions (a boat on the water, not standing on a sawhorse in a parking lot 10' from the mirrors), and it turns out that while it's possible to aim mirrors at a stationary target, it is very difficult or impossible to ignite an anchored boat 200' away, at least not without computer guided mirrors (which Archimedes did not have) or some sort of mechanical aiming system far more sophisticated than has ever been described in any of the ancient texts.

      Ultimately, even if you could get the death ray to work, it would be far less practical than the other solutions of the day (firing lit arrows at the ships). It's an interesting idea, and one that has promise at the small scale (testing on land with just a few mirrors to see if you can heat something up with concentrated sun beams), but on the large scale against a moving (hostile!) adversary you have almost no chance of success. Plus, the city was on the wrong coast anyway, so the whole idea was dead before it even started.

      --

      I read the internet for the articles.
    26. Re:Fuel leaking SR-71's by jddj · · Score: 2, Informative

      They've got one of these beautiful planes at the Udvar-Hazy flight center, near Dulles airport (Outside Washington, DC).

      It's worth a trip well-out-of-your-way to see the thing - you can get right up close to it, and it is astonishingly attractive; moreso for being so secret and rare.

      There's a whole bunch more good stuff at Udvar-Hazy - a great aviation museum.

    27. Re:Fuel leaking SR-71's by Rick+Bentley · · Score: 2, Informative

      Here's the Pilot's Operating Handbook for the SR-71: http://www.sr-71.org/blackbird/manual/

      It's a very cool read.

      --
      My favorite quote doesn't fit into 120 characters. Now no one will like me.
    28. Re:Fuel leaking SR-71's by winkydink · · Score: 2, Interesting

      Trust me, it lacks the sphincter-puckering powqer of watching the B-52's do their bi-annual minimum interval take off.

      That looks like the end of the world.

      --

      "I'd rather be a lightning rod than a seismometer." -Ken Kesey

    29. Re:Fuel leaking SR-71's by DynaSoar · · Score: 5, Interesting

      You know that plane is still classified and may or may not be in use or ready for use. I'm not sure details regarding the quantity and location of lox tanks are supposed to be well known. I've no doubt it's still classified, as are many much older and now irrelevant things; I know for a fact its true top speed and ceiling still are. I also have no doubt the plane is no longer in service, having been retired 10 years ago. NASA retains two of the original trainers, the only models still living, mostly for high altitude astronomy. All the others are accounted for and in museums. Maintaining and operating an otherwise barely supported craft would be very expensive. One can now get the better results from existing orbital observation craft than the SR-71 could ever produce.

      Its reported speed of Mach 3.2 was based on an average speed over a course; that wasn't necessarily the top. A Major Brian Shul reports having sustained Mach 3.5 at 80k ft. And an ex-USAF security police enlisted reports having guarded on in Thailand, and the pilot wore astronaut's wings (USAF astronaut standard is 50 miles, or 264k ft.). The former wouldn't require the mod I described, but the latter would have. The pressure suit used would have allowed flight to this altitude. In fact it does and then some -- it is the suit worn during ascent of the Space Shuttle.

      I spoke with a colleague at another SAC base, and he "wouldn't deny" having seen one or more with this mod, but wouldn't say more.

      The Blackbird had no effective stealth capability, so if one were still flying it'd be easily seen on today's modern radar and IR devices. Space program/satellite fans would have reported seeing something fitting the profile. Although I can only surmise what the second LOX tank was for, I have no doubt that if I saw it again, and the second fill port weren't removed, I could ID it.
      --
      "I may be synthetic, but I'm not stupid." -- Bishop 341-B
    30. Re:Fuel leaking SR-71's by delong · · Score: 2, Informative

      There's one at the Hill AFB flight museum in Layton, Utah as well. You can walk right up and touch it.

      There's a B-2 parked out front that you can walk under. That's quite a sight.

    31. Re:Fuel leaking SR-71's by tha_mink · · Score: 3, Interesting

      I understand that although several crashed none were ever *shot* down. That would seem to indicate that they could. Or that nobody ever shot at one. Though that's not true because it's well documented that it has outrun them missiles in the past. Real high and real fast is hard to shoot down unless you've got a real big head start.
      --
      You'll have that sometimes...
    32. Re:Fuel leaking SR-71's by tha_mink · · Score: 2, Informative

      The important thing is that you were *wrong* about the leaky airplane. Plus, you were smarmy. *Plus*, you went on a rant about apostrophes with poor sentence structure. So like, three strikes. Go away now.

      --
      You'll have that sometimes...
    33. Re:Fuel leaking SR-71's by Mahjub+Sa'aden · · Score: 4, Funny

      Thank you ever so much for clarifying. I feel as if the wool has lifted from my eyes... and been replaced with bricks.

      --
      What is is all that is. Isn't that obvious?
    34. Re:Fuel leaking SR-71's by cbunix23 · · Score: 2, Informative

      Wright Patterson AFB in Dayton, Ohio has an SR-71A, B-2A, F-15A, F-111F, and U-2; and that's just in the Cold War gallery.

    35. Re:Fuel leaking SR-71's by Sideswiped · · Score: 2, Interesting

      It may have been a hardpoint carried over from the Lockheed D-21/M-21 (modified A-12s that had a recon drone ridding piggyback).

      http://en.wikipedia.org/wiki/D-21_Tagboard
      http://www.habus.org/revealed/pics/gallery/a12drone.jpg
      http://www.dkimages.com/discover/previews/771/504805.JPG

    36. Re:Fuel leaking SR-71's by peterbye · · Score: 2, Informative

      And for those of us in the UK, the only Blackbird on display outside the US is at Duxford in Cambridgeshire.

  2. I still want to know... by WiglyWorm · · Score: 3, Insightful

    why are they called "stealth fighters"? They're actually a tactical bomber, and so far as I know, they don't have any method of attacking another air craft.

    1. Re:I still want to know... by Anonymous Coward · · Score: 2, Informative

      Because back in the day when it was being designed they called it a fighter to confuse potential spies.

    2. Re:I still want to know... by bigkahunafish · · Score: 4, Informative
      the theories regarding this are two-fold...

      First, fighters generally attract the better pilots than bombers, and since the F117 was a first strike or tactical strike craft, good pilots were of utmost importance...

      Second, naming it as a fighter helped with the secrecy surrounding its true capabilities and use, especially in Cold War times...

      --
      Eat a Chicken, You know you want to.
    3. Re:I still want to know... by Thelasko · · Score: 2, Interesting

      why are they called "stealth fighters"? They're actually a tactical bomber, and so far as I know, they don't have any method of attacking another air craft. I suspect they called it that to make advisories confused about the aircraft's capabilities.
      --
      One of our competitors trademarked the term "hypothesis". From now on, we will call them "boneheaded ideas".
    4. Re:I still want to know... by TellarHK · · Score: 2, Informative

      I loved that game, but what always struck me as mildly depressing was playing the classic "Jetfighter II" which had the YF-23 "Black Widow" in it, the plane that eventually lost out to the F-22 in that round of fighting proposals. The YF-23 was such a gorgeous concept.

      Of course, the best thing about Jetfighter II was mid 90's game physics. I fondly recall the time I landed a YF-23 on a carrier with a three-point landing due to intentional stalling at 10 feet off the deck. Low and slow, vector thrust upward, kill the throttle entirely and glide over the deck until you pop flaps and yank the nose up until you nail a stall then level off with gear down and just drop.

    5. Re:I still want to know... by mgabrys_sf · · Score: 4, Informative

      Um - no it doesn't "make the radar bounce back". Radar works by bouncing back a signal to detect. Meaning if it did - it wouldn't be invisible at all - it'd be working with radar just dandy. It deflects the radar's signal to produce a much smaller return signal. Meaning it was never "invisible" but had a small enough cross-section to be regarded as a non-threat.

    6. Re:I still want to know... by Richard_at_work · · Score: 2, Insightful

      The USAF fleet underwent significant consolidation in the cold year wars, with some of the light to medium bombers roles being moved to the new heavier multirole fighters of the era, with great effect. Thats where the F-117 gets its fighter designation.

    7. Re:I still want to know... by smellsofbikes · · Score: 3, Informative

      My understanding, based on talking to people who have designed systems to detect stealth aircraft, is that the OP is half right. The reason the F117 has all those big blocky facets is specifically to bounce the radar back in very direct lines, like a planar mirror, rather than in all directions, like a sphere. The idea being: you absorb as much as possible in your weird ferroabsorptive paint, but what you have to reflect, you reflect in thin lines rather than in broad arcs, and if possible you reflect them upwards, away from the radar receivers.

      --
      Nostalgia's not what it used to be.
    8. Re:I still want to know... by Ungrounded+Lightning · · Score: 5, Insightful

      why are they called "stealth fighters"? They're actually a tactical bomber, ...

      When the Continental Congress put together the country's very first army, they named it the "Second Army".

      The military is about hurting people and breaking things until the other side knuckles under. As Patton pointed out this works better if few of your own guys die for their country while getting the other poor saps to die for their own. A good military operation grabs every opportunity to improve their odds, both of success and survival.

      If calling a bomber a fighter both confuses the spys and gets the best pilots to enjoy flying its exceptionally high-value missions (with support and sensor technology limited to preserve stealth), why not do it?

      --
      Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    9. Re:I still want to know... by Anonymous Coward · · Score: 2, Interesting

      It wasn't about confusing spies, but rather adhering to treaty obligations. Various disarmmament treaties had limited the number of bombers each power would have operational. Many B52s had tail sections removed to render them "non-operational". Obviously, a fighter can carry a bomb. Bomb carrying does not, in and of itself, make an airplane a bomber. That is defined by characteristics such as range, size, payload, etc. Of course, such a careful play on the rules would be lost if you just went and called the thing a bomber.

  3. Don't worry about it... by thewils · · Score: 4, Funny

    I'm sure it will retire to a nice well-paid job in the defense industry.

    --
    Once I was a four stone apology. Now I am two separate gorillas.
  4. Microprose by tangent3 · · Score: 3, Interesting

    My fondest memories of the F117 is playing the Microprose simulator. The original version was named F19 Stealth Fighter until the F117 was declassified in which the version 2.0 of the game, updated with VGA graphics and Persian Gulf campaigns was renamed F117A Stealth Fighter.

    It was quite an interesting change, whereas in most other combat flight simulators like Falcon 3.0 and F15 Strike Eagle I would be actively seeking a fight with any enemy on my radar and pumping them full of sidewinders or 20MM, in F117A the mission is to avoid the enemy patrols and ground radars

    1. Re:Microprose by Anonymous Coward · · Score: 2, Interesting

      I used to do something similar on F-15 Strike Fighter. If you ran out of fuel during the game, you could hold the afterburner key down and get little periodic spurts of speed, right up to vmax. Used to play for hours on Joker fuel....

      Sounds like F15 and F117 sims had some interesting fuel/speed-related glitches.

  5. What are they working on now? by QuantumRiff · · Score: 3, Insightful

    the SR-71 was designed in the 60's, the stealth fighter was designed in the 70's, the F-22 started in the mid 80's, kinda makes you wonder what the hell they're working on now!

    I was pretty young, but I don't remember there being nearly as much "public" information about the stealth fighter until it was used in action. It seems there is alot more details about the F-22 before it was in service. Is that because there is more communication with the taxpayers nowadays, or because they don't want you to ask whats in the left hand?

    --

    What are we going to do tonight Brain?
    1. Re:What are they working on now? by TellarHK · · Score: 4, Insightful

      Knock your SR-71 design estimate back about a decade. The OXCART contract that created the SR-71 (evolving it from the A-12) was awarded in 1959, so all the real design work was done before 1960, it was just the construction that took a couple years. And the SR-71 served damn well until we put enough satellites in the sky to cover things almost as well with closer to realtime monitoring.

      Sometimes it makes you wonder just how many eyes the military really has up there now, if they were willing to mothball the SR-71 with no (public) clear successor.

    2. Re:What are they working on now? by PortHaven · · Score: 4, Interesting

      Nah....

      The F-22 is the real "stealth fighter". The F-117A was the stealth attack craft/tactical bomber.

      Fighters usually aren't all that super secret. But reconnaissance, and strategic assault vehicles. Now those are secret.

      The F-117A's mission is likely to be super-seded by unmanned stealth drones.

      The SR-71 was retired a while back. The F-117A was NOT a replacement for the SR-71. Rather, both operated concurrently for some time.

      The mostly likely replacement for the Blackbird is the Aurora project. Sometimes caught by seismologists and observers. Rumored to use a a pulsating scramjet and being the mach 5-8 range.

      Then there is the B2 (flying wing) bomber and the B1-B The B1-B being famous for numerous crashes. Though very few in later years. What was the change? The government had been only doing 85% of the maintenance recommended for the bombers by it's manufacturers. They began doing the full maintenance recommended maintenance, fluid changes, etc. Things ceased failing...go figure.

    3. Re:What are they working on now? by Thelasko · · Score: 2, Funny

      Sheriff of Rottingham: This is a stealth catapult, we've been working on it secretly for months. It can hurl one of these heavy boulders undetected, over a hundred yards, completely destroying anything in its path.

      Prince John: Wow! How's it work?

      Sheriff of Rottingham: It's rather simple. You get one of these heavy boulders, put it here where I'm sitting, and then pull on that lever.

      Prince John: Like this?

      [John pulls the lever and flings Mervin into the air]

      Sheriff of Rottingham: AAAAAAAAAAAAAAGGGGGGGGGGGHHHHHHH!

      --
      One of our competitors trademarked the term "hypothesis". From now on, we will call them "boneheaded ideas".
    4. Re:What are they working on now? by peragrin · · Score: 3, Interesting

      Actually the SR-71 served damn well until we put enough DIGITAL satellites into Orbit. The reason why the SR-71 was so useful was because the film canister could be brought back down quickly to develop the images. That didn't work so well for Satellites.

      The SR-71 is one of my all time favorite planes. One has to remember it was built with 1960's tech, as such digital computers and camera's weren't available yet.

      --
      i thought once I was found, but it was only a dream.
    5. Re:What are they working on now? by noewun · · Score: 4, Informative

      The B1-B also is a supersonic bomber -- I don't know if the Russkies have a supersonic bomber or not (and I'm too lazy to go check Jane's or FAS).

      Say hello to the Tu-160. And, yes, it look an awful lot like the B-1.

      Also note that the B-1B has a maximum speed of Mach 1.25 at altitude. The rapid advances in air-to-air missiles in the 1960s and 1970s changed USAF planing for bomber missions. Instead of flying high and fast (which just makes you a perfect target for SAMs unless you're an SR-71) the idea is fast and low, which is why the B-1s mission profile was changed to flying very fast at very low altitudes. Of course now the thing usually just hangs out on station waiting to be told where to drop its bombs.

      --
      I am a believer of momentum and curves.
    6. Re:What are they working on now? by Danse · · Score: 3, Funny

      With the improvements we've made with the unmanned craft, why build anything else? Your pilots get to stay safe out of harms way, you no longer have to degrade performance because of the limits of the human body, and you get to save money by not worrying about keeping the pilot alive. I think you're right that these remotely piloted craft are the future of combat. Combat evolved, if you will. In fact, the AF could do a lot to increase its recruiting prospects by developing the capability for these drones to teabag their opponents after defeating them. Perhaps incorporate the ability to spray a graffiti tag or spew racially insensitive invective. I know I find such tactics to be highly demoralizing and I generally go find something else to do fairly quickly.
      --
      It's not enough to bash in heads, you've got to bash in minds. - Captain Hammer
    7. Re:What are they working on now? by smallfries · · Score: 2, Interesting

      Well if you want to know what they look like... I can't vouch for how accurate these images are. I can see that they are either the largest clerical fuckup of all time, or a great hoax.

      Travelling through Madrid airport in the summer of 2003 there was a series of display cases with every Lockhead Martin aircraft every made. Gorgeous little wooden carvings. When I saw this beauty I nearly dropped from shock. Then I walked backwards on the travelator to snap the pic - hence the horrible blur. There is also a closeup.

      Either somebody in the marketing department made a career ending mistake, or someone in the modelling department had some fun with the spanish public. There should be enough plane nuts on these here threads to decide...

      --
      Slashdot: where don knuth is an idiot because he cant grasp the awesome power of php
  6. Deprecated Warfighting by TellarHK · · Score: 3, Interesting

    In a day and age where aircraft from the 1950's are still flying and in active service, to see something like the F-117 come and go so quickly has to be a sign of major design limitations from the first day of use.

    Two bombs, no Air-to-Air capability other than playing "How not to be seen." really well, and subsonic speeds just seemed to make the F-117 come across as oddball in my eyes. Either the F-22 has better stealth than we realize, or there's something newer, more stealthier and more secretive coming around.

    1. Re:Deprecated Warfighting by Gregb05 · · Score: 2, Insightful

      The B-2 is what you're looking for. Longer operational range, bigger payload, better stealth, looks prettier and it's easier to fly.
      B-2 is for stealth bombing and midnight strikes, F-22 is for air fighting, B-52 is used for heavy hitting when the radar is down or irrelevant. There's no niche for the F-117 any more.

      --
      --
    2. Re:Deprecated Warfighting by hcdejong · · Score: 4, Interesting

      Count on the F-22 having better radar stealth than the F-117. The F-117 fell victim to Moore's law: During its design, all the engineers were capable of simulating (for stealth characteristics) were flat panels, hence the faceted skin, which dictated the rest of the design.

      The size was another compromise (smaller = easier to hide), and the engines didn't have afterburners to minimise the IR signature, which meant no supersonic flight. Radar technology wasn't advanced enough to build a low-observable (or Low Probability of Intercept, LPI) air search radar, and a 1970's radar would compromise the aircraft's stealthiness even when turned off.

      Oddball maybe, but the F-117 was the best possible design with 1970s technology. To get it to work at all, everything else had to be sacrificed for the one mission that couldn't be done by any other platform: surprise attacks.

    3. Re:Deprecated Warfighting by Ironsides · · Score: 3, Informative

      Either the F-22 has better stealth than we realize, or there's something newer, more stealthier and more secretive coming around.

      Both. The F-22 is the first true stealth fighter, the B-2 is the first true stealth bomber. The F-117 was really a stealth hack. That said, given the long developement times on aircraft, there is always something newer in the works. Also, fighters (among other things) are made to be upgradeable over their lifespan. There have been 3 different generations of the F-18 for the military alone and the older ones are usually upgraded along the way instead of being replaced. That is in addition to 'minor' upgrades such as electronics. If you want to know what is cuttin edge today, you need a high level security clearance and to be in the need to know.
      --
      Fly me to the moon Let me sing among those stars Let me see what spring is like On jupiter and mars
    4. Re:Deprecated Warfighting by maxume · · Score: 3, Interesting

      The stealth technology at the point the plane was designed required that the plane have flat surfaces. The plane was built, on purpose, in the face of a major design limitation. As much as anything, it was a proof of concept that got more funding than it should have(i.e., the military probably didn't need to actually buy a production run).

      The F-22 might not have better stealth than we realize, but it is pretty clear that it is a whole new class of aircraft(beating expert F-15 pilots 3 to 1 is no joke) and it is stealthier than anything else that provides similar capabilities.

      --
      Nerd rage is the funniest rage.
    5. Re:Deprecated Warfighting by Darth_brooks · · Score: 5, Insightful

      Your generalizations don't quite fit here.

      True, the B-52 and C-130 are 1950's vintage *designs*, the actual airframes that are still in service are very late runs off the line. The current B-52's were built between 1960 and 1961, and the C-130's should all be post-1965 (or later). They also don't share any of the tactical missions that the F-117 performs. For example, the B-52 is a heavy bomber. It's going to drop a whole hell of a lot of metal on a target, or carry 1.5 imperial assloads of cruise missiles near a target, unload them, then head back home in time for "Lost". The C-130 has perfected the art of flying rubber dog poop out of Hong Kong.

      Now, the F-117's job is to take the first steps towards making the C-130 or the B-52's job possible. Strike missions on heavily defended targets. Given the high tolerances the skin of the airframe must meet in order to stay stealthy, normal wear and tear on the airframe (say, a wing tip that is now an inch or two higher than before thanks to a high-G turn) could negate most of the aircraft's advantage. Comparing the F-117 to anything is is comparing oranges to briefcases.

      The statement always comes up "what're they working on now? I bet they're using them thar captured UFO's and roswell alien stuff now!!!" Ummm, yeah, I doubt it. Instead of shrinking the airframe's radar signature in order to protect the pilot, they've just gone ahead and shrunk the airframe *and* the radar signature. Tomahawks, Predator drones, better satellites, and better communications between all three. That's what has retired the SR-71 and the F-117.

      I think we're finally beginning to see the retirement of some of the meat in the seat for the really, really, really dangerous stuff. You can have a $120 million dollar fighter with $3-5 million dollars worth of pilot take out a target, or $3 million dollar drone hit the same target. Even the government can do that math.

      --
      There are some people that if they don't know, you can't tell 'em.
    6. Re:Deprecated Warfighting by khallow · · Score: 2, Insightful

      I think we're finally beginning to see the retirement of some of the meat in the seat for the really, really, really dangerous stuff. You can have a $120 million dollar fighter with $3-5 million dollars worth of pilot take out a target, or $3 million dollar drone hit the same target. Even the government can do that math.

      Two things, first the marginal cost of the F-22 originally was around $25 million. What's happened is that the Pentagon is buying about a sixth as many planes as were originally planned. Second, the drones will need effective control infrastructure and as of yet, there's no standardized control infrastructure. That's going to add considerable cost. Finally, need I add that the cost of the F-22 is known while the drone cost is hypothetical. Frankly, I think there'll be considerable room for drones in a future US army, but it's not that straightforward a financial tradeoff.

    7. Re:Deprecated Warfighting by couchslug · · Score: 2, Informative

      "In a day and age where aircraft from the 1950's are still flying and in active service, to see something like the F-117 come and go so quickly has to be a sign of major design limitations from the first day of use."

      You are forgetting that fighter/attack aircraft lifecycles are much shorter than airlift/tanker lifecycles. There isn't a technology "race" with airlifters and tankers, or heavy strategic bombers like the B-52. Fighter/attack systems are obsoleted much more quickly.

      Another factor in retiring the 117 is that the Air Force is _desperate_ for money to replace aging aircraft it should have replaced years ago. That means dumping lots of support people such as personnellists, retiring every system they can, and focusing on priority number one which is total air dominance. Offing the 117 frees up the many people supporting it to shift to the Raptor.

      --
      "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
    8. Re:Deprecated Warfighting by Darth_brooks · · Score: 2, Insightful

      We have those already, they're called cruise missiles. They don't help much when the enemy is dropping bombs on your from their own planes. Problem with drones is that they'll likely be chewed to pieces by the enemy fighter planes. And that's fine. The air superiority role is being filled by the F-22 and I don't really see that role falling to drones at any point, with the exception of the distant future. Meat in the seat can still make decisions that autonomous aircraft can't, and have a level of adaptation that remote aircraft don't have yet.

      Sure, drones may get knocked out by SAM's, enemy fighters, etc. That's the point. You're throwing up 5 million dollar drones that have roughly the same strike power as an F-117 with longer loiter times (which is turning out to be the real benefit. Having a drone that can hang around waiting for things to get interesting must be an immeasurable asset.) and lower radar cross sections. Or, you're putting up a 25 million dollar drone that can loiter for 24-36 hours instead of putting a shift of U-2's out in enemy territory.

      Either way, when a drone gets shot down, at most you get some ribbing from the guys in the cube next to you who offer you another quarter so you can play again. No crisply folded flags, no footage on CNN 120 million dollar F-117 in a smoking heap on the group. No Francis Gary Powers being denounced in a show trial.
      --
      There are some people that if they don't know, you can't tell 'em.
    9. Re:Deprecated Warfighting by pato101 · · Score: 3, Insightful

      (beating expert F-15 pilots 3 to 1 is no joke)
      As far as I've read, those would be the numbers of an Eurofighter. I think that F-15 has no choices against F-22 (the actual words were unfair advantadge)
  7. Meanwhile... by operagost · · Score: 3, Funny

    ... after 56 years, the B-52s keep flying. No, I don't mean the band, although I do like the idea of roaming if I so desire.

    --

    Gamingmuseum.com: Give your 3D accelerator a rest.
    1. Re:Meanwhile... by stoolpigeon · · Score: 2, Insightful

      which goes to show you how much longer an airframe can last when not put under the stresses of acm.

      --
      It's hard to believe that's how Micronians are made. Why don't we see it right now by having you both kiss one another?
    2. Re:Meanwhile... by ari_j · · Score: 2, Informative

      The B-52s are coming back, though, and I do mean the band. Funplex is the new album. o hai - im in ur lurv shakk, roman w/ all ur rock lobstahs

    3. Re:Meanwhile... by TheOldBear · · Score: 2, Informative

      Air Combat Maneuvering - dogfighting or missile evasion.

      --
      Caution: Do not stare into laser with remaining eye.
  8. A good plane by Protonk · · Score: 5, Interesting

    The F-117 has a great history and it will be interesting to see it go. I'm not normally the military tech-fetishist type, but this was a supremely odd creature that got to fly. Embodied in this plane are so many examples of ingenuity and hubris, it makes a good vessel for late 20th century american history.

    We developed this plane in secret, with borrowed theories from the russians. The plane itself came out of a corporate Manhattan project, built by a combination of old salts who could wave their hands and make grumpy generalizations about engine configuration that hours of calculations would bear out and younger engineers employing technology that wasn't readily available outside the united states.

    It was kept secret until we felt the need to unveil it as the epitome of american superiority in Panama and the gulf war. We spent a decade lauding the precision strike capability, ignoring reports that smart bombs were only so smart. Only in the past 5 years have we grudgingly come to accept that there were limitations to the strategy of aerial bombardment, limitations that hampered our ability to fight and killed civilians on the ground. But that doesn't make this plane or its pilots evil or murderous. We just became caught up in the technology, the gritty night vision cameras resulting in static filled screens where buildings used to be.

    In a lot of ways, that is similar to our love affair with this plane. Ugly, but elegant. Unflyable without computer aided control but possessing strangely beautiful lines. Born of american ingenuity and sullied by hubris. It is a wonderful aircraft, and a great story. Thanks to the men (and women) who built it and flew it throughout the years.

    1. Re:A good plane by Dunbal · · Score: 2, Informative

      As far as I know they don't hover too well, either. GP must have taken some bad acid that day.

      --
      Seven puppies were harmed during the making of this post.
    2. Re:A good plane by Smauler · · Score: 2, Informative

      To be honest, they're not all that big either.... apart from those 3 points, the GGP is spot on ;).

  9. Not that great by Thelasko · · Score: 2, Insightful

    The stealth fighter was really more of a proof of concept of what stealth technology could do. The plane sacrificed quite a bit in aerodynamics to be stealth capable. It was a subsonic vehicle and, despite what it's name suggests, it had no air-to-air combat abilities.

    Although it was revolutionary at the time it first came out, keeping this aircraft in the skies would be a disservice to the taxpaying public.

    --
    One of our competitors trademarked the term "hypothesis". From now on, we will call them "boneheaded ideas".
  10. Re:Old technology by somersault · · Score: 2, Informative

    Link is a GNAA troll. Fuck you, anonymous coward. There were also way more fighter planes in WWII than F117As. And the tech in them is probably still classified? *shrug*

    --
    which is totally what she said
  11. Re:'Fighter?' by smooth+wombat · · Score: 4, Informative
    Yes. So far as I am aware, it was never designed for air-to-air combat. Rather, it was to be used as it was in the first days of the 1990 Gulf conflict during Bush I's tenure: to hit high value, heavily defended targets.


    More information on the role of the F-117 can be found at Frontline, AirToAirCombat.com, FAS as well as other sources on the intertubes. Last link has pictures of the aircraft as well as pictures and a non-Flash video of the aftermath of the only F-117 to ever be shot down. In this case, over Serbia.

    --
    We will bankrupt ourselves in the vain search for absolute security. -- Dwight D. Eisenhower
  12. USAF Deception by tjstork · · Score: 4, Interesting

    Actually, just the F117 Night Hawk is a bomber as far as I know

    The F- designation was actually deliberate. The USAF didn't want enemies to know that this was a bomber, not a fighter, so they named it differently.

    --
    This is my sig.
    1. Re:USAF Deception by Nimey · · Score: 4, Informative

      Numbers restarted from 1 starting in 1962, when the Navy and Marines switched to the Air Force's style of aircraft designations.

      Prior to that, a fighter might be designated F8U-3 -- that breaks down to Fighter, Design 8 from Vought (Vought's code was U), 3rd revision. Under the new designation system, that'd be the Vought F-8C Crusader. If it was the first design of a particular type from a company, it'd lack the middle number, e.g. the Douglas AD-2 Skyraider, which was later known as the A-1B Skyraider.

      --
      Hail Eris, full of mischief...

      E pluribus sanguinem
  13. B-52 reverse-Stealth System by PortHaven · · Score: 3, Interesting

    There was a proposition to modify the B-52's with reverse-stealth technology.

    A similar idea had been proposed for the B-52's a few years ago. Since you can't really make such a craft stealth, how do you keep them viable.

    Well B-52s are mainly used in one of two capacities. Single bomber support role, carpet bombing (albeit with more intelligent bombs these days) in prep for a land transaction. Or the more purposeful original intention of a strategic bomber. In which case a whole flight of bombers would be sent out to level much foe.

    But with radar and missiles, how can such aircraft get to their targets.

    I used to work on a 90ft schooner (sailboat for the landlubbers). Anyways, we had a radar reflector that would make us show up much larger on radar.

    The idea was to go the opposite route. Instead of stealth, have all the B-52's light up those radars as bright as they can. So instead of seeing the large B-52 on the radar you'd see something akin to the size of the ships in Independence Day. Huge giant radar blob. In fact dozens of giant radar blobs.

    So yes, you'd know something was coming. The radar makes that clear. But trying to pin point it's exact position and mobilize fighters becomes more challenging because well, it's showing up in almost a mile of air space or more. I don't think the Air Force ever went thru with the expense. But one never knows...it might have been done and listed as $200 toilet seats. ;-)

  14. Ben Rich's Book Highly Recommended by Nom+du+Keyboard · · Score: 4, Informative

    If you enjoy this kind of thing, I can't recommend Ben Rich's book Skunk Works: A Personal Memoir of My Years of Lockheed highly enough.

    --
    "It's the height of ridiculousness to say for those 9 lines you get hundreds of millions."
  15. Imperial assloads by sconeu · · Score: 3, Funny

    How many VW's in an imperial assload?

    Seriously, though, that's a fairly nice analysis.

    --
    General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
    1. Re:Imperial assloads by ill+stew+dottied+ewe · · Score: 4, Informative

      A B-52 carries up to 70000lbs in bombs, so an imperial assload would be 46667lbs. A new beetle weights 2743lbs, so an imperial assload is almost exactly 17 (2005) VW beetles, not including any imperial asses (passengers).

  16. Ben Rich's Account of the F-117 by glhturbo · · Score: 2, Interesting

    Go out and get Ben Rich's "Skunk Works: A Personal Memoir of My Years of Lockheed"... A fabulous read of the F-117 development, but also some other great stuff on the SR-71, etc...

    My favorite story is Mr. Rich and a young sergeant standing outside a missle command trailer watching the F-117 go over. Rich goes into the van, and the Marines have no clue. They do pick up a bogie, but it's the T-38 chase plane that was several MILES behind the F-117....

  17. Farewell, Wobblin Goblin by CompMD · · Score: 3, Insightful

    I remember first seeing an F-117 as a child right around when it was declassified. I vividly remember my world slowing down as I stared at it flying in awe, and my technophobe mother ran screaming to find somewhere to hide. Fast forward to today, and here I am, staff engineer and resident computer guy for an aerospace R&D company. Over the years I've had the privilege and honor of meeting and working with some incredible folks: designers, engineers, and pilots for aircraft such as the Beech Starship, Piaggio P-180 Avanti, A-12, SR-71, U-2, F-22, F-35, XB-70, X-29, F-104, and of course the F-117.

    Today I'll think of the stories and jokes from old and retired Lockheed friends. I've already seen one today and you could see the pained look on his face as he fondly reminisced about his days working on the 117 program. Its a lovely day here in town, and I think at the end of the day I'll head to the local brewery and have a toast to the engineers who dared to dream up such a contraption, and to an aircraft that inspired many.

  18. F-22 Not a skunk works project by DigitalPenguinDude · · Score: 3, Informative

    The F-22 was not a Skunk Works project. The F-22 program was acquired when Lockheed bought the General Dynamics Ft. Worth division which is now The Lockheed Tactical Aircraft division.

  19. Re:First the hard drive, now this.. by Dunbal · · Score: 2, Funny

    Don't forget about Raptor Jesus, he went extinct for your sins!

    --
    Seven puppies were harmed during the making of this post.
  20. The F-22 is impressive to see by The+Second+Horseman · · Score: 5, Interesting

    Saw one at the air show in Rhode Island last year. The first thing you notice is how damn loud the thing is. Compared to an F-15, F-16 or F/A-18's I've seen at shows, it was just painful, not uncomfortable. Even good earplugs didn't really help - you really need substantial ear protection, and even then you're likely to feel it in your skull. Aside from that, the big thing I noticed was how rapidly it could change speed and its maneuverability. Compared to the older aircraft it's like watching a superball bounce around. If you had no idea that the plane existed and you saw it at night in the sky at a distance, you'd never believe it was an aircraft. The thrust vectoring looked really effective. You don't have to know a lot about aircraft to see the difference, either - you can watch an F-22 after seeing another demonstration and the difference is obvious.

  21. Re:F22 ain't no Arrow by Lije+Baley · · Score: 2, Funny

    Yes, the ever-growing legend of the Avro Arrow. At this rate it's soon to be indistinguishable from Chuck Norris. Oh, and you left out the conspiracy theories.

    --
    Strange things are afoot at the Circle-K.
  22. The tech is just obsolete... by Anonymous Coward · · Score: 2, Insightful

    In the '70s they were only capable of calculating and apply Dr. Pyotr Ufrintsev's diffraction theories on flat objects, hence the "Hopeless Diamond" or faceted design of the F-117. As computing power and understanding of additional factors affecting stealth increased, the faceted design evolved in to the more effective and aerodynamically sound "continuous curvature" design of the B-2 bomber and F-22 fighter.

  23. "replace" is incorrect by dltaylor · · Score: 4, Informative

    The F-117 and the F-22 have two completely different missions, therefore the F-22 cannot "replace" the F-117. The F-117 is a first-strike night attack bomber, deploying, mostly, precision-guided munitions. It took on roles that would have required much larger formations had they been done with the F-111 (replacement for the F-105) which had much higher visibility, so needed escorts and AA suppression. The F-22 is supposed to replace the aging, but still very potent, F-15 as an air superiority fighter, while the F-15 is shuffled off to the strike fighter role as the F-15E.

    F-22s are much more expensive than F-15s. In theory, they are able to provide more kills-per-sortie than the F-15, so we would need fewer of them. The problem with that is that, despite supersonic cruise, there is only so much airspace that an F-22 can control, so, if the missions are geographically dispersed, a larger number of F-15s can provide more coverage.

    There is no longer an opposing air force in Iraq, and the Iranians were stupid enough to buy planes from us, so they don't really have one, either. Other than the US, there is almost no long-range bomber capability, so the only remaining function for the F-22 is as an escort for B-2s on first-strike missions into nations with active fighter forces, such as Russia, China, and Western Europe (if they don't stop picking on Microsoft).

    1. Re:"replace" is incorrect by Anonymous Coward · · Score: 2, Insightful

      Part of the reason the F-22 works out so much more expensive than the F-15 is the low number being built compared to the high development costs. The marginal cost of building additional F-22's is only around $75 million, rather than the $200 million you get if you include the entire program cost. New F-15's cost around $50 million (and the program cost dates back to the 60's and 70's, so you can't carry it forward equivalently).

      The thing about airspace is mostly true, and part of why the Air Force is pushing hard for more money to buy additional F-22's (since they only about 1/3 as much as a 747 each). However, because of the advanced sensors and information integration of the F-22, and it's supercruise ability, it takes multiple F-15's to equal the coverage of a single F-22. By detecting an opponent earlier and getting into an intercept position more quickly, you cover more airspace with a single flight. By having a more capable fighter, you can spread the same number around to more locations, having say, a pair of F-22's providing the same combat capability as four or even eight F-15's, while at the same time covering a moderately larger airspace.

      The F-22 is not intended to escort B-2's, except perhaps to perform precursor strikes on air defense systems. The B-2 would continue to operate on it's own. The F-22's primary mission would be to achieve air superiority by engaging fighter and air defense forces. Even small nations like Venezuala have reasonably competent aircraft (the crews are a separate question) like the MiG-29 and Su-35. The former is an air superiority fighter comparable to the F-18, and the latter is a ground attack fighter/bomber probably on par with the F-15E. In a conflict, the F-22's first job would be to eliminate those as a threat as quickly as possible (or more likely, make them decide not to fly them, as happened in Iraq in 2003 simply due to our AWACS + F-15's).

      After establishing air superiority, the F-22 would provide combat air patrol and probably some air-to-ground, although most of that would be reserved for F-15E, F-18, and F-35 JSF.

  24. No... by Maury+Markowitz · · Score: 2, Interesting

    > Today is the last for the Stealth Fighter which is being
    > replaced by the F-22 Raptor

    No it's not. The F-22 is an air-superiority fighter that is replacing the F-15 in that role. The F-117 is being replaced by nothing.

    This retirement leaves the USAF with no dedicated long-range tactical interdictors at all. While this gives them an excuse to fly the otherwise ridiculously overpriced B-1 and B-2 on these missions, it also means that in a hot-war they have a very real capability shortfall past the range of the F-16 or F-35.

    Maury

  25. SR71 took JP7 by Firethorn · · Score: 3, Interesting

    Jet fuel is a mixture of gasoline and kerosine.

    Not really. Depending upon the grade, it's its own distillate from the stack.

    There's different grades of jet fuel. For the SR71, it was a very special blend, closer to diesel then kerosine, but still designed to be liquid in both far colder and far hotter temperatures.

    The match trick works fine with it, for example.

    --
    I don't read AC A human right
  26. Stealthiness comparison: F-117 vs. F-22 by KH2002 · · Score: 2, Informative

    How does the radar signature of the F-22 compare to the F-117. Very favorably, from what I've seen....

    "Aircraft designers generally describe an airplane's radar cross section in terms of "decibel square meters," or dBsm. This is an analogy that compares the plane's radar reflectivity to the radar reflectivity of an aluminum sphere of a certain size. The B-2 reportedly has a radar signature of an aluminum marble. The F-22 Raptor interceptor is roughly the same, and the F-117 is only slightly less stealthy. The newer Joint Strike Fighter has the signature of an aluminum golf ball. The older B-1 bomber, designed during the 1970s and 1980s, is about the size of a three-foot (one-meter)-diameter sphere, whereas the 1950s-era B-52 Stratofortress, a monstrously non-stealthy airplane, has an enormous radar cross section of a 170-foot (52-meter)-diameter sphere. The size of an aircraft has little relationship to its radar cross section, but its shape certainly does."

  27. Risks and rewards. by Ungrounded+Lightning · · Score: 2, Interesting

    The irony on the political side is it works better when you keep your own guys willing to die for their country while convincing the other guys not to.

    I don't see that as particularly ironic. Just another example of the way things tend to get inverted when dealing with the use or threat of force - the "economy of negative value".

    To deter or defeat aggressors - whether schoolyard bullies, criminals, or political aggressors - you need to be willing to RISK lives. But the goal is to attain some purpose, not to die. (When you must die, you try to sell your life as dearly as possible. But it's still better to accomplish the objective AND be alive to accomplish another.)

    Making "dying in battle" a goal (rather than an unfortunate mishap) leads to poor strategy. While it does make it harder to turn the fighter away from his attack, it makes him prone to trade his life away cheaply. He'll go after low-value high-risk targets rather than picking off a low-risk target and getting away or attacking something of high value with a high risk of interception and incarceration. (You see a lot of this in the Middle East.)

    --
    Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
  28. Pimp my corporate priviledges. by Scrameustache · · Score: 3, Funny

    I'm sure it will retire to a nice well-paid job in the defense industry. The revolving door of the military industrial congress complex: It is retiring from military service to civilian service.

    3 words: Stealth jet limo.
    The next person to make fun of Scientology gets a surprise visit from Travolta and his payload.
    --

    You can't take the sky from me...

  29. It's not a very useful plane by wicka · · Score: 2, Interesting

    We built the F-117 and the B-2 because during the Cold War we actually needed planes that could go in and bomb targets without being seen. Today there are very few occasions where we will have to send in bombers without having air superiority (usually only the very very beginning of campaigns like the first few days of Gulf War Dos). That's why our primary bomber is a 50 year old airframe (B-52). The F-117 and B-2 are now just massively expensive to operate, hold far fewer bombs (the B1-B suffers from the same problem but is not nearly as expensive), and really don't serve any useful purpose 90% of the time.

  30. Also by StarKruzr · · Score: 2, Funny

    there's an A-12, which is basically the same plane, at Udvar Hazy in Maryland. It's an annex of the Smithsonian Air and Space museum.

    This also happens to be Enterprise's current perch. I had no idea she was there the first time I went. So I'm walking along and turn a corner, and HOLY SHIT SPACE SHUTTLE@!>!@$!#E#KRK

    It was kind of a surreal experience.

    --

    +++ATH0
  31. Re:Can't outrun SAMs by tha_mink · · Score: 2

    It can't outrun modern missiles, hence it's grounding. OK, money was an issue too. Actually, that's false. It COULD outrun modern missiles, unless the missiles had a real good head start. 2200 Knots at 85000 feet. The reason it got grounded is that we've got satellites to do its business now. There's no need to have it up there when we can just direct a satellite to take the pictures.
    --
    You'll have that sometimes...
  32. And why do we need the F22, again? by DrVomact · · Score: 2, Insightful

    It continues to amaze me how the military procurement machine goes on designing and buying immensely complex weapons that have no conceivable use and do not improve the security of this country (the U.S.A.) one whit...and nobody thinks this is strange. Sure, it's a helluva pretty plane...take up a collection and build your own if you like, but I'm so damn sick of my tax money going to these things.

    We do not need an air superiority fighter/bomber/sigint/ewar platform like this. (Notice how it does everything...baaaad sign.) We do not have an enemy that makes its employment worthwhile, nor are we remotely likely to become involved in any war with a technologically sophisticated enemy for the simple reason that such an enemy will have nukes, and people with nukes do not fight other people with nukes.

    What we really need to spend some money on is people: we need to attract and keep competent officers and soldiers in the Army (or the USMC, if you've given up on the Army), we need to pay these people what they're worth, give them decent benefits, and raise personnel standards throughout. That would take a lot less money than our current high-tech fixation, and would buy us a lot more security. But it's not about security, is it?

    --
    Great men are almost always bad men--Lord Acton's Corollary
  33. Yeah... by Vr6dub · · Score: 2, Funny

    what he said.

  34. I loved that plane,.. thanks to Microprose.. by AbRASiON · · Score: 2, Interesting

    http://en.wikipedia.org/wiki/F-19_Stealth_Fighter

    (Admitedly they change the name / details somewhat) but god damn that was a brilliant simulation for the C64, really great gameplay - well thought out levels and sadly it even taught me some geography (I still know where those SAMS are located in the Libyan campaigns)

  35. Re: F-117A Stealth Fighter Retired by Ihlosi · · Score: 2, Funny

    "Look what I just found on eBay ..."

  36. An SR-71 50 miles up? Not possible. by Viol8 · · Score: 2

    At that alititude you're for all intents and purposes in a hard vacuum. There would be no oxygen for the engines and even more worrying , no air for the wings or tail to work with. Even if it could get up that high using a rocket booster it would just tumble out of control.