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casinterest
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Air Force X-51A Test Failed

Wed Aug 15, 2012 7:49 pm

http://security.blogs.cnn.com/2012/0...e-hypersonic-test-fails/?hpt=hp_t1


The article is not exceptionally clear. Did they make Mach 6, and lose the fin during acceleration, or were they in the process of boosting to Mach 6. They menion later in the article that the Scramjet itself was never activated?

Anyone with more info.
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Spacepope
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RE: Air Force X-51A Test Failed

Wed Aug 15, 2012 10:45 pm

Apparently it didn't get a chance. A tweet from Wired mag:

"At 9:35 EDT Wired's defense vertical Danger Room tweeted:
Bad news for the USAF's mach 5 missile. X-51A failed its flight test; a fin problem caused a loss of control b4 the engine could kick in."
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DrStrange
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RE: Air Force X-51A Test Failed

Thu Aug 16, 2012 7:21 am

Interestingly enough the story was pretty big in the German media. I found it in a couple of papers/magazines.
The fin problem apparently started 16 seconds after the launch from the B52. The article mentions that control was lost another 15s after that when discarding the rocket engine.

I included the article from Der Spiegel(no English though), because there are some nice pictures of the X-51A.
http://www.spiegel.de/wissenschaft/t...start-in-den-pazifik-a-850303.html
Just click on the picture where it says "Fotos" and keep on clicking on the picture to advance the gallery.  
 
chuchoteur
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RE: Air Force X-51A Test Failed

Thu Aug 16, 2012 7:15 pm

 
MadameConcorde
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RE: Air Force X-51A Test Failed

Thu Aug 16, 2012 7:21 pm

Quoting DrStrange (Reply 2):
Interestingly enough the story was pretty big in the German media.

Germany had a project for about the same thing in the '30s during the Third Reich:
the SilberVogel

Quote:
Silbervogel, German for silver bird, was a design for a rocket-powered sub-orbital bomber aircraft produced by Eugen Sänger and Irene Bredt in the late 1930s for The Third Reich/Nazi Germany.

....
and it came to the...

Sanger II Space Plane
On 18 October 1985 Messerschmidt-Boelkow-Bloehm (MBB) began renewed studies of the Sänger spaceplane, this time a "piggyback" two-stage-to-orbit horizontal takeoff concept.[6]

https://en.wikipedia.org/wiki/Silbervogel

so this US Air Force hypersonic rocket is nothing new.

        

and then there was this DARPA thing that they said had reached Mach20

Superfast Military Aircraft Hit Mach 20 Before Ocean Crash, DARPA Says
SPACE.com Staff
Date: 18 August 2011 Time: 10:34 AM ET

A superfast unmanned military plane traveled at 20 times the speed of sound and managed to control itself for three minutes before crashing into the Pacific Ocean in a recent test, military officials said.

http://www.space.com/12670-superfast...-military-aircraft-darpa-htv2.html

While the X-51A Waverider is designed to fly only at six times the speed of sound.

 Wow!    Wow!
There was a better way to fly it was called Concorde
 
bennett123
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RE: Air Force X-51A Test Failed

Thu Aug 16, 2012 11:04 pm

Do any of these hypersonic planes land in one piece.
 
connies4ever
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RE: Air Force X-51A Test Failed

Fri Aug 17, 2012 12:00 am

Quoting bennett123 (Reply 5):
Do any of these hypersonic planes land in one piece.

No landing gear. These are proof of concept a/c in terms of propulsion and configuration.
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StuckInCA
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RE: Air Force X-51A Test Failed

Fri Aug 17, 2012 2:20 am

Quoting MadameConcorde (Reply 4):
so this US Air Force hypersonic rocket is nothing new.


I don't understand. Neither of the things you posted about was ever built. And the one concieved in the 40's was only about half as fast.

It's pretty much like if someone suggested Concorde was nothing new because we already have planes that fly at 40,000 ft at mach 0.8.
 
GAIsweetGAI
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RE: Air Force X-51A Test Failed

Sun Aug 19, 2012 3:38 am

The real novelty here is the ramjet propulsion system:

Quoting MadameConcorde (Reply 4):
SilberVogel

was rocket-powered, from the Wikipedia article;

Quoting MadameConcorde (Reply 4):
and then there was this DARPA thing that they said had reached Mach20

which was achieved by diving vertically from the edge of the atmosphere, IIRC.

If any previous projects come close to the X-51, it's these two:
http://en.wikipedia.org/wiki/Leduc_0.10
http://en.wikipedia.org/wiki/Nord_1500_Griffon

And they weren't ecxactly hypersonic...
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