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US Army Scraps Comanche Helicopter
swordboy writes "The US Army just scrapped the Comanche helicopter program - a joint venture with Boeing and United Technologies. After 20 years and billions of taxpayer dollars, it never produced an operational helicopter. Open-source helicopter, anyone?" The article notes: "The Comanche is designed to receive and process intelligence from drones and surveillance aircraft and pass it to ground units. The Army was directed in 2002 to focus its research on producing a reconnaissance helicopter rather than one that can attack as well as scout. The helicopter was intended to counter Soviet weapons."
What makes you say that? I'm curious. If you're upset because the Bradley doesn't go up well against MBTs, you're barking up the wrong tree, because the Bradley wasn't designed for that purpose.
If you're saying that the Bradley suffers as a personnel carrier because of its armament, I'd be interested in your sources. I'm not saying this with sarcasm - I've just never heard anyone badmouth the Bradley since the infamous 60 Minutes piece back when the Bradley was still under development.
I have heard mech guys talk about how much they love their Bradley, including one track commander whose Bradley took a T-72 round and kept fighting.
Read the EFF's Fair Use FAQ
Making one (the issue with the rotors) is not that hard (theory, I realize, actually making one is really hard, but so is making a non-stealth helicopter too).
There are 2 schools of thought in relation to stealth. Absorbtion (very hard, and I can probably overcome it with more transmisison power) and reflection away from you (much easier). There was a test of radar-detectability of cars (car&driver or something) with speed-radars, and the corvette was the lowest (this was some time ago).
Most people thought it was that the car was fiberglass (not true, as the frame underneath had plenty of metal) but rather that the radiator was tilted way back, which reflected the radar away (up) from the receiver. This is also why the F-117 is all angular, it is very hard to get a radar reflection, as no facet is facing towards you (they also use absorbtive/transparent materials).
Take a mirror, and lay it flat in a dark room. Shine a flashlight at an oblique angle, and the mirror is almost invisible (but you see stuff past it with the deflected beam). One thing you may see (it's on the stealth airplanes) is covering the intakes/exhausts with deflecting gratings (helps diffuse thermal stuff as well), which will deflect away from the observer, rather than the verticle wall of spinning turbine blades. The mirror trick is how that F-117 was shot down back in the late 90's in bosnia, which was thought to be one radar (the flashlight) shining across, with a receiver across the valley (like standing by the wall and figuring out the deflection of the beam and back-calculating the location of the deflecting object)
If you look at the apache. you will notice the canopy is angular, which was designed to do the same thing with sunlight (less reflections back to the observer).. The blades can be made of low-radar crossection material (heck fiberglass would be virtually invisible as an example, as would carbon fiber or ceramics), but you also need to make it balistically tolerant (cermaics shatter when shot for instance), and flexible to survive the rigors of hard flying. Making it silent is probably much harder than making it radar low-observable.
With the proliferation of shoulder fired heat-seaking missles, one also must make your copter heat stealthy as well, and often tricks like blowing the exhaust up into the rotor wash spreads the heat signature out to hide it, and make it hard to lock up.
Finally for all those who are talking about survivability, the apache is highly balistically tolerant (military speak for armored), and is also designed to allow for survivability of the pilots in the event of being shot down. There is a test film (or marketing PR film) which showed the apache taking direct fire on a test range from a .50 caliber machine gun with no internal damage, or blade damage (I realize it was staged "just so", but none-the-less impressive...).
Actually it is the ability to be shot up and still fly that keeps the pilot safe in A-10s. Planes like the F-16 can be shot down with a single rifle shot and I'm sure the newer planes like the F-22 and the F-35 will be the same because there are so many critical components.
When you actually read about the design criteria for the A-10 it is actually pretty surprising. They were originally very cheap to produce and design because they don't have much technology at all. Just basic physics. The wings on the A-10 actually produce twice the lift required to keep it flying. In theory they could have half a wing shot of and still fly home.
In Gulfwar 1 they didn't even have many of the more advanced combat systems that they have now because they were on the verge of being mothballed and they demonstrated to be the most effective air platform in that war. The same thing happen a year ago as well. They're effective both because they can get really close to the action and therefore be accurate but they also have a psycological affect on the enemy. Look for some videos of the A-10 fireing its cannon. Its sounds scary.
One problem with making an aircraft stealthy is that stealthy characteristics are very aerodynamically unstable characteristics and therefore require computers to make them fly and translate what appears to be an easy control job by the pilot into a very complex aerodynamic control job by the computer. This is completely the opposite of what makes the A-10 effective.
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