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Space Forum / Shuttle / August 2007De-orbit burn
On the display on Nasa TV, it looked like the shuttle was going backwards at an angle, not directly backwards, when the de-orbit burn occurred. Was the display wrong or does this somehow enhance the cross range capability? > On the display on Nasa TV, it looked like the shuttle was going > backwards at an angle, not directly backwards, when the de-orbit burn > occurred. Was the display wrong or does this somehow enhance the cross > range capability? The Deorbit burn was a fuel wasting burn, pointing out of plane was to burn up more OMS fuel, lighten the vehicle. They also dumped 58 seconds of forward APU fuel, get the CG right. > > On the display on Nasa TV, it looked like the shuttle was going > > backwards at an angle, not directly backwards, when the de-orbit burn [quoted text clipped - 4 lines] > up more OMS fuel, lighten the vehicle. They also dumped 58 seconds of > forward APU fuel, get the CG right. Craig, I heard a couple references to something having to do with 57 seconds. Houston called it up as 57, the crew read it back as 50 and ground corrected them to 57. Any idea what that was about? Was it related to this forward RCS burn? Thanks in advance and take care . . . John >> > On the display on Nasa TV, it looked like the shuttle was going >> > backwards at an angle, not directly backwards, when the de-orbit burn [quoted text clipped - 11 lines] > ground corrected them to 57. Any idea what that was about? Was it > related to this forward RCS burn? Yeah, 57 seconds. >> On the display on Nasa TV, it looked like the shuttle was going >> backwards at an angle, not directly backwards, when the de-orbit burn [quoted text clipped - 4 lines] >up more OMS fuel, lighten the vehicle. They also dumped 58 seconds of >forward APU fuel, get the CG right. Interesting, thanks for the info! >>> On the display on Nasa TV, it looked like the shuttle was going >>> backwards at an angle, not directly backwards, when the de-orbit burn [quoted text clipped - 5 lines] > > Interesting, thanks for the info! Forward RCS propellant, not forward APU fuel. All three APUs are in the aft compartment. >>>> On the display on Nasa TV, it looked like the shuttle was going >>>> backwards at an angle, not directly backwards, when the de-orbit burn [quoted text clipped - 8 lines] > Forward RCS propellant, not forward APU fuel. All three APUs are in the > aft compartment. corrected again. :-) |
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