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Did The SR-71A (At High Speed) Glow Inflight?  
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Posted (6 years 1 month 3 weeks 19 hours ago) and read 7715 times:

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

Andrea

12 replies: All unread, jump to last
 
User currently offlineKC135TopBoom From United States of America, joined Jan 2005, 12071 posts, RR: 52
Reply 1, posted (6 years 1 month 3 weeks 18 hours ago) and read 7694 times:

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.

User currently offlineHaveBlue From United States of America, joined Jan 2004, 2090 posts, RR: 1
Reply 2, posted (6 years 1 month 3 weeks 12 hours ago) and read 7605 times:

Parts of the airframe were between 800 and 1,200 degrees F iirc.


Here Here for Severe Clear!
User currently offlineVzlet From United States of America, joined Mar 2004, 829 posts, RR: 0
Reply 3, posted (6 years 1 month 3 weeks 10 hours ago) and read 7566 times:



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

Certainly in the IR spectrum...



"That's so stupid! If they're so secret, why are they out where everyone can see them?" - my kid
User currently offlineN328KF From United States of America, joined May 2004, 6483 posts, RR: 3
Reply 4, posted (6 years 1 month 2 weeks 6 days 23 hours ago) and read 7323 times:



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

Gee willikers. So does my Passat!



When they call the roll in the Senate, the Senators do not know whether to answer 'Present' or 'Not guilty.' T.Roosevelt
User currently offlineVzlet From United States of America, joined Mar 2004, 829 posts, RR: 0
Reply 5, posted (6 years 1 month 2 weeks 6 days 9 hours ago) and read 7203 times:



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
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 6, posted (6 years 1 month 2 weeks 6 days 6 hours ago) and read 7159 times:

At what temperature does titanium, stainless-steel, and aluminum become incandescent at?

User currently offlineKC135TopBoom From United States of America, joined Jan 2005, 12071 posts, RR: 52
Reply 7, posted (6 years 1 month 2 weeks 5 days 22 hours ago) and read 7055 times:



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.


User currently offlineSP90 From United States of America, joined May 2006, 388 posts, RR: 0
Reply 8, posted (6 years 1 month 2 weeks 5 days 6 hours ago) and read 6953 times:



Quoting KC135TopBoom (Reply 7):
turkey feathers

The what?  Confused


User currently offlineHaveBlue From United States of America, joined Jan 2004, 2090 posts, RR: 1
Reply 9, posted (6 years 1 month 2 weeks 5 days 2 hours ago) and read 6900 times:

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]


Here Here for Severe Clear!
User currently offlineSP90 From United States of America, joined May 2006, 388 posts, RR: 0
Reply 10, posted (6 years 1 month 2 weeks 2 days 2 hours ago) and read 6661 times:



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.


User currently offlineSprout5199 From United States of America, joined Feb 2005, 1833 posts, RR: 2
Reply 11, posted (6 years 1 month 2 weeks 1 day 22 hours ago) and read 6630 times:

The engines did:



Dan in Jupiter


User currently offlinePhatAlbert From United States of America, joined Oct 2005, 113 posts, RR: 3
Reply 12, posted (6 years 1 month 2 weeks 1 day 20 hours ago) and read 6605 times:



Quoting Sprout5199 (Reply 11):
The engines did

Thats pretty neat... Smorfs anyone?



**Isaac**
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