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bitcoin bastard posted:Isn't there a potential issue with ultrasmall process architecture and the higher ambient radiation once you get into thinner atmosphere? I don't know, but there definitely is a problem with cosmic rays knocking an electron out of place in some RAM, necessitating a reset once on the ground.
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May 26, 2016 01:59
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I think center and bigger approach controls are mostly up to the end of last century technology-wise, so that's something!
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May 26, 2016 02:38
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Godholio posted:Sounds like a lowest bidder to me. Sun being lowest bidder on anything would blow my mind. I guess it could happen with DoD stuff though.
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May 26, 2016 02:48
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fknlo posted:I think center and bigger approach controls are mostly up to the end of last century technology-wise, so that's something! Most of my friends are in IT, and are continually in awe of the inefficiency in every step of development, installation, testing, operation, support, and every other phase of ATC equipment.
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May 26, 2016 03:14
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Godholio posted:Sounds like a lowest bidder to me. Pretty sure you won't have that problem now that Oracle owns Sun!
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May 26, 2016 03:33
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Linedance posted:I don't know, but there definitely is a problem with cosmic rays knocking an electron out of place in some RAM, necessitating a reset once on the ground. High-altitude stuff (so like most airliners) are mostly concerned about neutron-induced SEUs -- the stuff running FADECs and similar are going to be hardened against that, or have some crazy FIT number that ensures failures (if they occur) are rare enough that redundancy or error correction/detection is enough to deal with it.
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May 26, 2016 03:45
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FrozenVent posted:Wonder how much you'd pay for an aviation grade fry basket. Aeronautical Insanity: How much for an aviation grade fry basket?
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May 26, 2016 03:56
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CommieGIR posted:JSTARS have: DL380 G1 and G2s more than likely, probably more Proliant 1xxx and 3xxx series from the Compaq days.
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May 26, 2016 03:58
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TEAH SYAG posted:DL380 G1 and G2s more than likely, probably more Proliant 1xxx and 3xxx series from the Compaq days. Actually, G5 and G6s
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May 26, 2016 04:00
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Today's the anniversary of American Airlines 191, the DC-10 whose engine fell off during takeoff from ORD, causing the deadliest aviation accident in the United States. Someone on Facebook requested a copy of the CVR transcript from the NTSB and posted it here.
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May 26, 2016 05:12
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never mind. the answer was already posted.
HawkHill fucked around with this message at 05:48 on May 26, 2016 |
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May 26, 2016 05:46
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EvilJoven posted:"Because aviation", that answer to all of life's important questions. I just found out today that the recommended spark plugs for my Stinson are $49.50 EACH. And there are TWELVE OF THEM.
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May 26, 2016 07:26
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movax posted:High-altitude stuff (so like most airliners) are mostly concerned about neutron-induced SEUs -- the stuff running FADECs and similar are going to be hardened against that, or have some crazy FIT number that ensures failures (if they occur) are rare enough that redundancy or error correction/detection is enough to deal with it. This was specifically to do with power distribution units in the crown of the 787. It may have been neutrons but the key finding was it was ~space rays~, whatever particles they may consist of. And due to the relentless weight savings demanded by Boeing, and the high energy of the particles, effective shielding would be prohibitive. This was several years ago, GE might have worked out a fix or workaround in the meantime.
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May 26, 2016 07:54
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Cat Mattress posted:When LockMart got the F-35's computer to crash only every ten hours instead of every four hours as before, the USAF said "okay, cool, good enough, we'll accept it like that" You're conflating the failure rate of the electrical system with the failure rate of the software. Those crashes aren't caused by components blowing apart or transistors getting stuck open. I made no claims about software.
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May 26, 2016 13:44
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I've seen pictures of what happens when the foam fire suppression triggers in a hangar, but until yesterday I'd never witnessed it directly. Three airplanes completely buried, you couldn't even tell by looking in the hangar that there were aircraft in there. Then the wind whipped up and I ended up being slowly chased down the ramp by a big foam whirlwind, it was like the Stay Puft Man exploded. One of the aircraft was completely opened up for a mod period. Cockpit, all the access panels, engine covers, everything. I have no idea how you clean that up.
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May 26, 2016 19:23
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So what happened to trigger the foampocalypse? False alarm? System malfunction? Someone's poo poo actually being on fire?
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May 26, 2016 20:01
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Phanatic posted:One of the aircraft was completely opened up for a mod period. Cockpit, all the access panels, engine covers, everything. I have no idea how you clean that up. rubbing alcohol?
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May 26, 2016 20:04
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Nebakenezzer posted:rubbing alcohol? and q-tips.
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May 26, 2016 20:08
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The Locator posted:and q-tips. All of the q-tips.
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May 26, 2016 20:52
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EvilJoven posted:So what happened to trigger the foampocalypse? False alarm? System malfunction? Someone's poo poo actually being on fire? Unknown at this point. But not the last one.
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May 26, 2016 21:05
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Cat Mattress posted:When LockMart got the F-35's computer to crash only every ten hours instead of every four hours as before, the USAF said "okay, cool, good enough, we'll accept it like that" So ten hours at let's say 200 MHZ without crashing well that's how many processor cycles that worked vs one that didn't soooo (200000000*60*60*10) / ((200000000*60*60*10)+1) = 99.999999999986% reliable! 
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May 26, 2016 21:13
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I got to see a jet powered drag truck set off the fire suppressant system in an empty B2 hanger at Whiteman AFB during an air show a long time ago. It was pretty cool.
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May 26, 2016 21:49
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Phanatic posted:I've seen pictures of what happens when the foam fire suppression triggers in a hangar, but until yesterday I'd never witnessed it directly. Three airplanes completely buried, you couldn't even tell by looking in the hangar that there were aircraft in there. What planes?
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May 26, 2016 23:30
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Godholio posted:What planes? Oh, it's a big pretty white one with wings and stripes and it looks like a big Tylenol. (AH-64s, actually. I just love that movie.)
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May 27, 2016 01:10
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CommieGIR posted:JSTARS have: Considering the timeframe, Sun stuff was extremely popular in DoD at the time. In pre-Linux days Solaris was all the rage. At WPAFB I knew people with Sun workstations on the desk still. (2010) Isn't JSTARS getting modernized? I remember reading something about it at work. (my company is involved somehow)
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May 27, 2016 01:48
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The AF is in a perpetual stop-go-wait-whatarewedoing-go-repeat process of figuring out what they want to use as a replacement. If they're going to replace it. Or if they should combine it into a multirole something. No, let's replace it. Or maybe just upgrade it. Or combine it with AWACS or RJ or something. Or...
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May 27, 2016 02:48
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Godholio posted:The AF is in a perpetual stop-go-wait-whatarewedoing-go-repeat process of figuring out what they want to use as a replacement. If they're going to replace it. Or if they should combine it into a multirole something. No, let's replace it. Or maybe just upgrade it. Or combine it with AWACS or RJ or something. Or... Sounds like you guys are doing it the Canadian way - do nothing until you find the perfect solution in all conceivable senses
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May 27, 2016 02:53
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It's kind of been a mess since the start. They were being used in combat ops before the AF even decided if it wanted them, then by the time they decided YES Boeing had already killed the 707 line so the entire fleet is third-hand cargo jets and poo poo.
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May 27, 2016 03:34
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They'll replace it with a 787 variant and find out that composites don't work well when it comes to mounting radomes or wedgetails. That, or they'll go 737-9/MAX and just build a shitload of them.
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May 27, 2016 06:34
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Following up on the helicopter history posts, I ran across this today: Baumhauer helicopter, ca.1925 [1600 × 1165] Netherlands Institute of Military History flickr commons  Looked this up on Wiki and it said: quote:Von Baumhauer's design made some major achievement which greatly influenced further development of helicopters. It used a single rotor, as opposed to two counter-rotating rotors on which most contemporary designs were based. He was one of the first to use the tail rotor to counteract the torque produced by the main rotor. The tail rotor was powered by its own engine (for easier control) and its angle of incidence could not be adjusted during flight. Another notable achievement was use of collective and cyclic pitch control. The swashplate principle was applied. Below the rotor, two concentric rings were mounted, connected to each other with bearings. The non-rotating inner ring could be tilted and moved along the rotor shaft. The outer ring rotated with the rotor and adjusted blade angles via rods. This enabled to adjust blade pitch according to blade's current angle, a mechanism which is still used in modern helicopters. HawkHill fucked around with this message at 07:02 on May 27, 2016 |
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May 27, 2016 06:52
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Greataval posted:Polishing windows is messy and lame as gently caress to do. not as bad as polishing aluminum I mean, yeah it looks great on an old plane but gently caress you man I ain't doing that again
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May 27, 2016 08:49
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Greataval posted:E-jet modules are junk that will break solders or simply not load if you sneeze in the general direction and cost any from 60k for custon I\O to 120k for NiM proc cards. Oh so true...
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May 27, 2016 09:45
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Half way through my first a380 trip. Really is huge when you see it up close. Also probably the comfiest and smoothest flight I've ever been on. Is that a thing are bigger planes less susceptible to turbulence? And now that I've tempted fate it's probably going to be turbulence all the way to Australia....
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May 27, 2016 21:35
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Crawshayi posted:Half way through my first a380 trip. Really is huge when you see it up close. Also probably the comfiest and smoothest flight I've ever been on. I eventually want to do the DFW-SYD flight. I'll probably pony up for Business Class, but not First.
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May 27, 2016 22:01
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Crawshayi posted:Is that a thing are bigger planes less susceptible to turbulence? Absolutely.
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May 28, 2016 00:11
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Crawshayi posted:Half way through my first a380 trip. Really is huge when you see it up close. Also probably the comfiest and smoothest flight I've ever been on. You always hit turbulence ~10 degrees either side of the equator
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May 28, 2016 00:17
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SpaceX landed their rocket, again. I think they've got it down.
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May 28, 2016 00:56
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CommieGIR posted:SpaceX landed their rocket, again. I think they've got it down. I kinda feel bad and good that it's not that exciting any more. Probably the same way the general public felt about the moon landings 
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May 28, 2016 00:58
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Wait til Falcon Heavy starts flying and they're landing 3 per launch.
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May 28, 2016 01:09
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P-47 Jackie's Revenge went into the Hudson an hour or so ago with a mechanical. Pilot had minor injuries but is okay, plane's getting scrapped by the Corps of Engineers. Used to work that plane when she came to our airshow and it's a shame. Glad the pilot's okay though
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May 28, 2016 02:14
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