bigphilnyc
Posts: 3874
Joined: Sat Jan 19, 2002 10:43 pm

Shuttle Does Back Flip In Space!

Thu Feb 11, 2010 11:19 pm

Flipping end over end so those on space station can inspect the belly. Very cool.

http://www.liveleak.com/view?i=869_1265812096
Phil Derner Jr.
 
DfwRevolution
Posts: 8588
Joined: Sat Jan 09, 2010 7:31 pm

RE: Shuttle Does Back Flip In Space!

Fri Feb 12, 2010 2:50 am

This maneuver has been performed on every Space Shuttle flight since STS-107. Except for STS-125 of course, which did not visit the ISS.
 
Burkhard
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Joined: Fri Nov 17, 2006 9:34 pm

RE: Shuttle Does Back Flip In Space!

Fri Feb 12, 2010 12:20 pm

Nice to watch nevertheless, thanks for the link.
 
petera380
Posts: 242
Joined: Tue Feb 08, 2005 12:35 am

RE: Shuttle Does Back Flip In Space!

Fri Feb 12, 2010 7:34 pm

So why does it do a back flip and not a roll?
 
rwessel
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Joined: Tue Jan 16, 2007 3:47 pm

RE: Shuttle Does Back Flip In Space!

Sat Feb 13, 2010 2:08 am

Quoting petera380 (Reply 3):
So why does it do a back flip and not a roll?

Probably because the pitch maneuver lets them get a better look at the leading edges than a roll would.
 
HaveBlue
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Joined: Fri Jan 30, 2004 3:01 pm

RE: Shuttle Does Back Flip In Space!

Sat Feb 13, 2010 3:03 am

Quoting petera380 (Reply 3):
So why does it do a back flip and not a roll?
Quoting rwessel (Reply 4):
Probably because the pitch maneuver lets them get a better look at the leading edges than a roll would.

Probably cause there are no nozzles on the wings, but there are on the nose and tail, so it makes much more sense to do a back flip then roll. You would need reaction rockets on the wingtips to affect a roll easily.
Here Here for Severe Clear!
 
rwessel
Posts: 2448
Joined: Tue Jan 16, 2007 3:47 pm

RE: Shuttle Does Back Flip In Space!

Sat Feb 13, 2010 4:08 am

Quoting HaveBlue (Reply 5):
Probably cause there are no nozzles on the wings, but there are on the nose and tail, so it makes much more sense to do a back flip then roll. You would need reaction rockets on the wingtips to affect a roll easily.

The Shuttle has perfectly adequate roll control in space. While it's true that the lever arm of the RCS thrusters in roll mode is not as long as that in pitch or yaw mode (they're on the sides of the nose and outboard of the OMS engines), the Shuttle's mass is much more concentrated on the longitudinal axis than on the lateral or vertical axis, which compensates to some degree. Frankly I don't know what the maximum angular accelerations in each of the axis is, but it doesn't matter much for the inspection flip - it's not a fast maneuver.

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