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gothamspotter
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Usaf Releases First B-2 Stealth Crash Photos

Mon Jul 14, 2008 8:18 pm

If you ever wanted to know what $1 1/2 billion would look like melted down, here it is. The ejection seats seem to have fared pretty well, though.

B-2 Stealth Bomber Crash Scene Photos: Exclusive First Look [Popular Mechanics]
 
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WarRI1
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 2:43 am

If I was the pilot, or co-pilot I would like my seat for a keepsake. I wonder if they can be reused?
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mark5388916
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 5:50 am



Quoting WarRI1 (Reply 1):

Re-used.. doubt it, that seat went through a lot of stress, but if I was the pilot, it'd be in my living room!

Mark
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L-188
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 6:53 am

I am impressed with how well that cabin stayed together.

If you have seen the video of the crash on YouTube, you know what I am refering to.
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MCIGuy
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 6:56 am

Just goes to show all the doomsayers who said carbon-fiber (plastic) airplanes would "smash into a million pieces" in a crash. Looks to me like your basic crash site, and the frame is in fewer pieces than I've seen a lot of aluminum planes.
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dragon6172
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 5:56 pm

That should buff out nicely... when will it be back in the air?  Wink
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 9:09 pm

Reading about how the failure occurred I can't help thinking that there must have been a way for the computers to realize that something was very wrong before the thing even had enough speed to lift up.

For example have the computers run a sanity check on sensor data at 20kts. If things are clearly wrong (eg. a large mismatch in detected speed coming different sensors: pressure, wheel speed, GPS, etc.) automatically abort the takeoff. Check for any fatal conditions and just abort (either automatically or a "stop or die" warning to the pilot). Only have the code run once at the beginning of takeoff. Would this kind of code ever make it into an aircraft?

(I write embedded software, but nothing even remotely close to being safety related.)

Quoting L-188 (Reply 3):
I am impressed with how well that cabin stayed together.

It is quite impressive. It looks like the area behind the cockpit has more damage (fire?) than the nose.

Video
 
curlyheadboy
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 10:49 pm

Interesting to notice the pulled ejection handle on the seat and the "pilot" identification marking on the headrest's side. Looks like the crash itself could be survivable, while the fire would probably have been fatal to the crew.

BTW, what's the green cylinder? Emergency oxygen?
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474218
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 10:56 pm



Quoting MCIGuy (Reply 4):
Just goes to show all the doomsayers who said carbon-fiber (plastic) airplanes would "smash into a million pieces" in a crash. Looks to me like your basic crash site, and the frame is in fewer pieces than I've seen a lot of aluminum planes.

The B-2 is not plastic, it is made of aluminum.
 
NoUFO
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RE: Usaf Releases First B-2 Stealth Crash Photos

Tue Jul 15, 2008 11:26 pm



Quoting CURLYHEADBOY (Reply 7):

BTW, what's the green cylinder? Emergency oxygen?

Yes. The B-2 uses an ACES II which is being explained here:

http://www.ejectionsite.com/acesiitech.htm

Quoting 474218 (Reply 8):
The B-2 is not plastic, it is made of aluminum.

"Many aspects of the low-observability process remain classified; however, the B-2's composite materials, special coatings and flying-wing design all contribute to its 'stealthiness.'"

http://www.af.mil/factsheets/factsheet.asp?fsID=82
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MCIGuy
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RE: Usaf Releases First B-2 Stealth Crash Photos

Wed Jul 16, 2008 7:16 am



Quoting 474218 (Reply 8):
The B-2 is not plastic, it is made of aluminum.

Yeah, there is some aluminum in it, of course, but the hull is CFRP. Aluminum reflects radar like a mirror.  Smile
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474218
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RE: Usaf Releases First B-2 Stealth Crash Photos

Wed Jul 16, 2008 2:16 pm



Quoting MCIGuy (Reply 10):
Yeah, there is some aluminum in it, of course, but the hull is CFRP. Aluminum reflects radar like a mirror.

First is not a boat.

Second, all exterior surfaces are coated with a radar absorbing coating.
 
dragon6172
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RE: Usaf Releases First B-2 Stealth Crash Photos

Wed Jul 16, 2008 5:04 pm



Quoting 474218 (Reply 11):
First is not a boat.

Do believe there are several terms interchangable between air and sea craft, hull being one of them. Port, starboard, captain, pilot, even cockpit are used for both. I do believe most everyone knows what he meant when he said hull, so whats the issue?
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L-188
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RE: Usaf Releases First B-2 Stealth Crash Photos

Thu Jul 17, 2008 2:13 am



Quoting MCIGuy (Reply 10):
Quoting 474218 (Reply 8):
The B-2 is not plastic, it is made of aluminum.

Yeah, there is some aluminum in it, of course, but the hull is CFRP. Aluminum reflects radar like a mirror.

Your both wrong.

CFRP is fiberglass.

The sales people like calling then "Composites" to make it sound fancy, but it is just stranded carbon fiber and plastic blankets in a resin.....aka Fiberglass.
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MCIGuy
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RE: Usaf Releases First B-2 Stealth Crash Photos

Thu Jul 17, 2008 3:40 am



Quoting L-188 (Reply 13):
The sales people like calling then "Composites" to make it sound fancy, but it is just stranded carbon fiber and plastic blankets in a resin.....aka Fiberglass.

I have a CFRP kayak paddle and the next one down in the model series was labeled as "fiberglass". That one was cheaper, heavier and looked different. They used a crystal clear resin and you can plainly see the layup. This is a 196cm whitewater paddle and it only weighs 30 oz, strong as anything though. I've dropped a few waterfalls and played in countless waves with it and it's barely even knicked up, and I've had it for seven years.  Smile
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Analog
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RE: Usaf Releases First B-2 Stealth Crash Photos

Thu Jul 17, 2008 4:55 am



Quoting L-188 (Reply 13):
CFRP is fiberglass.

Not quite (as far as I understand it). Fiberglass (glass fibers) is used to reinforce plastic (GRP), just like carbon fiber is used to reinforce plastic (CFRP). Both GRP and CFRP are are composites.

Carbon fiber (C) is not the same as fiberglass (SiO2), though the idea is the same for composites. One can even use both in a composite.

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sv7887
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RE: Usaf Releases First B-2 Stealth Crash Photos

Thu Jul 17, 2008 2:22 pm

Uh Oh Better get Maaco..


That is a sad sight...I wonder if Congress would authorize a B-2B program to make some more of them. It seems foolish to build only a handful of them when the DOD has spent so much money in developing the plane.

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