Blackbird
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Did The SR-71A (At High Speed) Glow Inflight?

Wed Mar 05, 2008 5:25 am

Did the SR-71 glow inflight at high-speed from kinetic heating (not counting the exhaust plume)

Andrea
 
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kc135topboom
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Wed Mar 05, 2008 6:51 am

No, IIRC, the outside skin temps ran between 300 degrees F and 600 degrees F. These are not near enough to make titanium glow, but is enough to make skin panels expand to seal the fuel leaks.
 
HaveBlue
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Wed Mar 05, 2008 12:40 pm

Parts of the airframe were between 800 and 1,200 degrees F iirc.
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vzlet
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Wed Mar 05, 2008 2:40 pm



Quoting Blackbird (Thread starter):
Did the SR-71 glow inflight at high-speed

Certainly in the IR spectrum...
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N328KF
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Thu Mar 06, 2008 2:02 am



Quoting Vzlet (Reply 3):
Certainly in the IR spectrum...

Gee willikers. So does my Passat!
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vzlet
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Thu Mar 06, 2008 3:31 pm



Quoting N328KF (Reply 4):
So does my Passat!

Hmmm... Have you tried using a JP-7/ethanol blend?
"That's so stupid! If they're so secret, why are they out where everyone can see them?" - my kid
 
Blackbird
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Thu Mar 06, 2008 7:18 pm

At what temperature does titanium, stainless-steel, and aluminum become incandescent at?
 
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kc135topboom
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Fri Mar 07, 2008 2:29 am



Quoting Blackbird (Reply 6):
At what temperature does titanium, stainless-steel, and aluminum become incandescent at?

steel/stainless steel will begin glowing around 1100 degrees F, titanium needs to be a lot hotter than that, maybe closer to 1500 degrees F. But, IIRC even the "turkey feathers" didn't glow that much.
 
SP90
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Fri Mar 07, 2008 7:07 pm



Quoting KC135TopBoom (Reply 7):
turkey feathers

The what?  Confused
 
HaveBlue
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Fri Mar 07, 2008 11:10 pm

Quoting SP90 (Reply 8):
Quoting KC135TopBoom (Reply 7):
turkey feathers

The what?

Turkey Feathers is a nickname for the variable diameter exhaust nozzle 'segments' on some fighter and bomber jets. They could be wide open or closed down to a much smaller hole depending on the power setting.

As seen here, for example, on the F-16.

http://img301.imageshack.us/img301/5935/pwnozzlekj5.jpg

[Edited 2008-03-07 15:11:23]
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SP90
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Mon Mar 10, 2008 11:09 pm



Quoting HaveBlue (Reply 9):
Turkey Feathers is a nickname for the variable diameter exhaust nozzle 'segments' on some fighter and bomber jets. They could be wide open or closed down to a much smaller hole depending on the power setting.

As seen here, for example, on the F-16.

I can see the resemblance now. Thanks for the info.
 
sprout5199
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Tue Mar 11, 2008 2:24 am

The engines did:



Dan in Jupiter
 
phatalbert
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RE: Did The SR-71A (At High Speed) Glow Inflight?

Tue Mar 11, 2008 4:30 am



Quoting Sprout5199 (Reply 11):
The engines did

Thats pretty neat... Smorfs anyone?
**Isaac**

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