The standard term is "bleed air", not "air bleed". (I was an F-16 engine mech and crew chief (and Comm/Nav on Phantoms and Broncos).
We don't yet know what caused the bleed air leak. but bleed air ducting isn't something new and leaks tend to be either because of improper connection or duct failure (bleed air is bled from the engine compressor, but it's HOT and at very high volume).
"While the oxygen generating system on Haneyâ(TM)s jet didnâ(TM)t fail, it did shut down because oxygen from the bleed air system, which feeds the OBOGS, was leaking into the engine spaces"
Cooling and running it through a molecular sieve to save doing LOX servicing is theoretically a good idea, but the MAIN reason to have OBOGs is to get rid of the base LOX plant, support equipment, and servicing personnel.
Could have been a "bleed air failure" where engine bleed air powering the system wasn't sent to it, or a duct leaked, or some other problem.
Engine compressor bleed air is used to power various turbines and tapped to pressurize fuel tanks etc. Bleed air problems aren't anything new.
A conventional LOX system doesn't HAVE or need bleed air though, and one crashed F-22 probably cost more than the LOX plant, lox carts, and support equipment for several bases!
OBOGS has been in use for several years on other aircraft including F-16s.
This isn't "pushing the envelope", it's fielding a system with problems when very practical and proven alternatives have been in service for decades.
Convert the aircraft to a conventional LOX reservoir, and if the place it fits is hard to get to, extend the servicing connections. You can do onboard LOX servicing with conventional LOX bottles on fighters.
Been there, done that, and it's not difficult. (LOXing frogs and large insects is good fun BTW as they shatter amusingly when struck or thrown. Servicing crew get bored on night shift...)
Make vehicles who maintenance doesn't REQUIRE considerable hands-on manipulation of objects and sims would work, but at that point there's near-zero need for mechanics.
Even in primitive aircraft, the aircrew actuated controls "remotely" by linkage and cable.
Mechanics are "closer" to the equipment components than operators.
He's not more than an attention whore who could have, as any G.I. who has had access to even low-level classified knows, pursued his agenda via legal channels over time and built a case if his evidence was sufficient.
That appears to have been too much work compared to doing a data dump.
He violated tregulations. That was an adult choice.
"Which is actually Airbus relies on sensor input over the "pilot"
Fly-by-wire flight controls by their nature treat pilot inputs as a "request" which they attempt to implement with their parameters such as G-limiting and stability augmentation.
Lose enough sensors (unlikely) or get the wrong inputs and you can lose control.
"He was an egocentric sociopath who lived a life of luxury as his country struggled in abject poverty."
Standard for pre-democratic Asia. He lived like the potentate he was, and the ruling group benefited. No reason to expect the Norks to change since they have a winning game and the South will have an excuse to send them aid as a supplicating gesture.
The South Koreans talk a lot about their fraternal Norther brothers, but they also know they'd be a disaster to assimilate.
That doesn't mean the Nork leaders won't just plug a replacement into the slot, then play the USUAL games with their fraternal SK brothers to keep the game going.
Norks in power care not a whit about lesser Norks, and have zero incentive to change. They have every incentive to maintain their position.
A shitload of people who cable and DSL in the US don't reach, and millions more in rest-of-world.
I keep a stash of Winmodems to replace modems belonging to friends which get damaged by lightning, and save my Jaton Explorer from 1999 (with which I first browsed Slashdot using Corel Linux) for troubleshooting.
"While members of congress may not know the technical details of how a combustion engine works, they have a general idea of how it works.While members of congress may not know the technical details of how a combustion engine works, they have a general idea of how it works."
That's quite an asserted conclusion.
Auto mechanics is often "voodoo" to old fuckers too (I'm an old mechanic and have observed this often) so just because an old Congresscritter is good at what they do doesn't mean they know fuck-all about how an engine works.
They have always been big. Contemplate the vast number of "spear" and "rock" variations in modern weaponry.
DU "spears" can slice through two enemy tanks in one shot. Flechette rounds (little "spears") are fired against personnel in close combat.
There will be many future wars. That's human nature. They will happen and it is better to be ready than not. People aren't "reasonable" so it is necessary to slay them if negotiation won't work.
"âoeI donâ(TM)t know what weapons will be used in world war three, but in world war four people will use sticks and stones.â â" Albert Einstein"
That's adorable, but there are and will be many, many, many wars which are not Total War and lend themselves to using high tech to limit own-side casualties.
Regardless of your stance on war, the Iraq and Afghanistan squabbles have had very light casualties compared to wars where massive less-discriminate force HAD to be used because that was the only game in town.
Slashdot Mirror
The F-104 "Zipper" was a very fast and capable aircraft, but also demanding to fly.
The US bought the vastly more complex Phantom, but needed a fighter-bomber and not a point-defense machine.
That led to MANY "wire chafing" detection classes for maintenance personnel.
Fighters are flexy and harnesses move about unless properly restrained.
The standard term is "bleed air", not "air bleed". (I was an F-16 engine mech and crew chief (and Comm/Nav on Phantoms and Broncos).
We don't yet know what caused the bleed air leak. but bleed air ducting isn't something new and leaks tend to be either because of improper connection or duct failure (bleed air is bled from the engine compressor, but it's HOT and at very high volume).
http://defensetech.org/2011/12/15/af-alaska-f-22-crash-due-to-pilot-error/
"While the oxygen generating system on Haneyâ(TM)s jet didnâ(TM)t fail, it did shut down because oxygen from the bleed air system, which feeds the OBOGS, was leaking into the engine spaces"
Cooling and running it through a molecular sieve to save doing LOX servicing is theoretically a good idea, but the MAIN reason to have OBOGs is to get rid of the base LOX plant, support equipment, and servicing personnel.
Some "ancient" history:
http://www.f20a.com/f20obogs.htm
Could have been a "bleed air failure" where engine bleed air powering the system wasn't sent to it, or a duct leaked, or some other problem.
Engine compressor bleed air is used to power various turbines and tapped to pressurize fuel tanks etc. Bleed air problems aren't anything new.
A conventional LOX system doesn't HAVE or need bleed air though, and one crashed F-22 probably cost more than the LOX plant, lox carts, and support equipment for several bases!
Typical LOX container:
http://www.draeger.aero/prodliq.html
OBOGS has been in use for several years on other aircraft including F-16s.
This isn't "pushing the envelope", it's fielding a system with problems when very practical and proven alternatives have been in service for decades.
Convert the aircraft to a conventional LOX reservoir, and if the place it fits is hard to get to, extend the servicing connections. You can do onboard LOX servicing with conventional LOX bottles on fighters.
Been there, done that, and it's not difficult. (LOXing frogs and large insects is good fun BTW as they shatter amusingly when struck or thrown. Servicing crew get bored on night shift...)
"Direct control" as in "no flight control computer outputs to actuators other than direct response to controls" without pitot-static and AOA?
Good idea.
Fine for theory of operation so well and good, but without considerable tactile experience one cannot be an effective "mechanic".
Much of this is because you manipulate parts you cannot see and must rely on "feel" to properly assemble.
Make vehicles who maintenance doesn't REQUIRE considerable hands-on manipulation of objects and sims would work, but at that point there's near-zero need for mechanics.
Even in primitive aircraft, the aircrew actuated controls "remotely" by linkage and cable.
Mechanics are "closer" to the equipment components than operators.
"Is there a remedy against Facebook taking over the lion's part of what many people consider as "social life" ? Can we bring Facebook down ?"
Great idea! You should Tweet about it!
He's not more than an attention whore who could have, as any G.I. who has had access to even low-level classified knows, pursued his agenda via legal channels over time and built a case if his evidence was sufficient.
That appears to have been too much work compared to doing a data dump.
He violated tregulations. That was an adult choice.
"Which is actually Airbus relies on sensor input over the "pilot"
Fly-by-wire flight controls by their nature treat pilot inputs as a "request" which they attempt to implement with their parameters such as G-limiting and stability augmentation.
Lose enough sensors (unlikely) or get the wrong inputs and you can lose control.
"He was an egocentric sociopath who lived a life of luxury as his country struggled in abject poverty."
Standard for pre-democratic Asia. He lived like the potentate he was, and the ruling group benefited. No reason to expect the Norks to change since they have a winning game and the South will have an excuse to send them aid as a supplicating gesture.
The South Koreans talk a lot about their fraternal Norther brothers, but they also know they'd be a disaster to assimilate.
That doesn't mean the Nork leaders won't just plug a replacement into the slot, then play the USUAL games with their fraternal SK brothers to keep the game going.
Norks in power care not a whit about lesser Norks, and have zero incentive to change. They have every incentive to maintain their position.
Enough that USR still make this classic!
http://www.usr.com/products/modem/modem-product.asp?sku=USR5686G
"Most people stopped buying them because the manufactures forgot why people were getting them in the first place."
Or because the manufacturers KNEW why people were buying them in the first place and preferred to guide them elsewhere.
There wasn't much for non-lethal riot control gear back then, and issued rifles didn't have effective non-lethal accessories.
A shitload of people who cable and DSL in the US don't reach, and millions more in rest-of-world.
I keep a stash of Winmodems to replace modems belonging to friends which get damaged by lightning, and save my Jaton Explorer from 1999 (with which I first browsed Slashdot using Corel Linux) for troubleshooting.
"The ones who should be worried about this are not Microsoft. Rather, they are Mozilla. "
If they cared, they'd change. They don't.
"You will know we are in a serious depression when manufacturing really comes back to the US."
You know when we don't price our labor out of the market we get more investment.
Bridgestone, Continental, MTU, BMW all invest in the US because it makes sense as their labor prices rise and ours become affordable.
"Slashdot seems to post a lot of stories about improved solar cells, but solar cells never seem to improve."
Slashdot is ENTERTAINMENT, and hearing about tech that (might) pan out is interesting even though it isn't really useful information early on.
"The Red Cross and others seem to want to build a war chest so that when a big disaster hits they will be prepared. "
No shit?
Good luck beating donation lag when you need to cut checks for response teams, supplies and other urgent needs immediately!
http://www.redcross.org/portal/site/en/menuitem.1a019a978f421296e81ec89e43181aa0/?vgnextoid=f9efd2a1ac6ae210VgnVCM10000089f0870aRCRD
"While members of congress may not know the technical details of how a combustion engine works, they have a general idea of how it works.While members of congress may not know the technical details of how a combustion engine works, they have a general idea of how it works."
That's quite an asserted conclusion.
Auto mechanics is often "voodoo" to old fuckers too (I'm an old mechanic and have observed this often) so just because an old Congresscritter is good at what they do doesn't mean they know fuck-all about how an engine works.
"Going to be very big in future wars."
They have always been big. Contemplate the vast number of "spear" and "rock" variations in modern weaponry.
DU "spears" can slice through two enemy tanks in one shot. Flechette rounds (little "spears") are fired against personnel in close combat.
There will be many future wars. That's human nature. They will happen and it is better to be ready than not. People aren't "reasonable" so it is necessary to slay them if negotiation won't work.
"âoeI donâ(TM)t know what weapons will be used in world war three, but in world war four people will use sticks and stones.â â" Albert Einstein"
That's adorable, but there are and will be many, many, many wars which are not Total War and lend themselves to using high tech to limit own-side casualties.
Regardless of your stance on war, the Iraq and Afghanistan squabbles have had very light casualties compared to wars where massive less-discriminate force HAD to be used because that was the only game in town.
"DARPA needs to be defunded, we don't need to waste anymore $$$ in military tech."
"Return the internet you are using" and renounce all ARPA/DARPA tech in every form. :)