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Shuttle Does Back Flip In Space!  
User currently offlineBigPhilNYC From United States of America, joined Jan 2002, 4077 posts, RR: 54
Posted (4 years 9 months 2 weeks 1 day 9 hours ago) and read 4751 times:

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.
6 replies: All unread, jump to last
 
User currently offlineDfwRevolution From United States of America, joined Jan 2010, 997 posts, RR: 51
Reply 1, posted (4 years 9 months 2 weeks 1 day 6 hours ago) and read 4671 times:

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.

User currently offlineBurkhard From Germany, joined Nov 2006, 4405 posts, RR: 2
Reply 2, posted (4 years 9 months 2 weeks 20 hours ago) and read 4518 times:

Nice to watch nevertheless, thanks for the link.

User currently offlinepetera380 From United States of America, joined Feb 2005, 354 posts, RR: 0
Reply 3, posted (4 years 9 months 2 weeks 13 hours ago) and read 4354 times:
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So why does it do a back flip and not a roll?

User currently offlinerwessel From United States of America, joined Jan 2007, 2391 posts, RR: 2
Reply 4, posted (4 years 9 months 2 weeks 6 hours ago) and read 4241 times:
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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.


User currently offlineHaveBlue From United States of America, joined Jan 2004, 2121 posts, RR: 1
Reply 5, posted (4 years 9 months 2 weeks 6 hours ago) and read 4227 times:

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.



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User currently offlinerwessel From United States of America, joined Jan 2007, 2391 posts, RR: 2
Reply 6, posted (4 years 9 months 2 weeks 4 hours ago) and read 4220 times:
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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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