Did the Shuttle's rudder or elevons operate when flown on its carrier 747?How were the pilots of the space shuttle able to operate the rudder after time in space?ISRO's space plane on top of of a rocket - how unstable was it?What's inside NASA N911 Shuttle Carrier Aircraft (SCA 747)?Was Shuttle tile loss an accident waiting to happen?Space Shuttle “go at throttle up”Is this “Attach Orbiter Here / Note: Black Side Down” sign on the Shuttle Carrier Aircraft real?How would the space shuttle have been retrieved following a TAL out of Vandenberg?Could Space Shuttle's wings be diminished?Why would a space shuttle have flown a normal first-stage and early-second-stage ascent trajectory during an RTLS abort?Precisely when did the Shuttle's roll program occur?What was the Shuttle Carrier Aircraft escape tunnel?How was the Shuttle loaded and unloaded from its carrier aircraft?
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Did the Shuttle's rudder or elevons operate when flown on its carrier 747?
How were the pilots of the space shuttle able to operate the rudder after time in space?ISRO's space plane on top of of a rocket - how unstable was it?What's inside NASA N911 Shuttle Carrier Aircraft (SCA 747)?Was Shuttle tile loss an accident waiting to happen?Space Shuttle “go at throttle up”Is this “Attach Orbiter Here / Note: Black Side Down” sign on the Shuttle Carrier Aircraft real?How would the space shuttle have been retrieved following a TAL out of Vandenberg?Could Space Shuttle's wings be diminished?Why would a space shuttle have flown a normal first-stage and early-second-stage ascent trajectory during an RTLS abort?Precisely when did the Shuttle's roll program occur?What was the Shuttle Carrier Aircraft escape tunnel?How was the Shuttle loaded and unloaded from its carrier aircraft?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
$begingroup$
While being ferried on the Shuttle Carrier Aircraft, were the shuttle orbiter's control surfaces (rudder and elevons) adjusted by controls in the SCA, to assist maneuvers? (They were, after all, fly-by-wire.) Or were the control surfaces simply locked in a neutral position?
space-shuttle shuttle-carrier-aircraft
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
$endgroup$
add a comment |
$begingroup$
While being ferried on the Shuttle Carrier Aircraft, were the shuttle orbiter's control surfaces (rudder and elevons) adjusted by controls in the SCA, to assist maneuvers? (They were, after all, fly-by-wire.) Or were the control surfaces simply locked in a neutral position?
space-shuttle shuttle-carrier-aircraft
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
$endgroup$
1
$begingroup$
It would require the Shuttle apu to be fuelled and running to provide electric and hydraulic power for the operation of the rudder and elevons.
$endgroup$
– Uwe
8 hours ago
$begingroup$
@Uwe is correct. The APUs were running for the drop tests, but not for ferry. (Slight correction - Shuttle APUs didn't provide electrical power, just hydraulics).
$endgroup$
– Organic Marble
8 hours ago
1
$begingroup$
Sorry for the error about APUs electrical power, but to use the APUs to provide hydraulic power electric power is needed. So the APUs and the fuel cells should be fuelled and running to use the shuttle orbiter's control surfaces.
$endgroup$
– Uwe
7 hours ago
1
$begingroup$
related but different: This answer to ISRO's space plane on top of of a rocket - how unstable was it? suggests that its control surfaces were not operating during ascent.
$endgroup$
– uhoh
2 hours ago
add a comment |
$begingroup$
While being ferried on the Shuttle Carrier Aircraft, were the shuttle orbiter's control surfaces (rudder and elevons) adjusted by controls in the SCA, to assist maneuvers? (They were, after all, fly-by-wire.) Or were the control surfaces simply locked in a neutral position?
space-shuttle shuttle-carrier-aircraft
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
$endgroup$
While being ferried on the Shuttle Carrier Aircraft, were the shuttle orbiter's control surfaces (rudder and elevons) adjusted by controls in the SCA, to assist maneuvers? (They were, after all, fly-by-wire.) Or were the control surfaces simply locked in a neutral position?
space-shuttle shuttle-carrier-aircraft
space-shuttle shuttle-carrier-aircraft
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
asked 8 hours ago
DrSheldonDrSheldon
10.3k2 gold badges38 silver badges96 bronze badges
10.3k2 gold badges38 silver badges96 bronze badges
1
$begingroup$
It would require the Shuttle apu to be fuelled and running to provide electric and hydraulic power for the operation of the rudder and elevons.
$endgroup$
– Uwe
8 hours ago
$begingroup$
@Uwe is correct. The APUs were running for the drop tests, but not for ferry. (Slight correction - Shuttle APUs didn't provide electrical power, just hydraulics).
$endgroup$
– Organic Marble
8 hours ago
1
$begingroup$
Sorry for the error about APUs electrical power, but to use the APUs to provide hydraulic power electric power is needed. So the APUs and the fuel cells should be fuelled and running to use the shuttle orbiter's control surfaces.
$endgroup$
– Uwe
7 hours ago
1
$begingroup$
related but different: This answer to ISRO's space plane on top of of a rocket - how unstable was it? suggests that its control surfaces were not operating during ascent.
$endgroup$
– uhoh
2 hours ago
add a comment |
1
$begingroup$
It would require the Shuttle apu to be fuelled and running to provide electric and hydraulic power for the operation of the rudder and elevons.
$endgroup$
– Uwe
8 hours ago
$begingroup$
@Uwe is correct. The APUs were running for the drop tests, but not for ferry. (Slight correction - Shuttle APUs didn't provide electrical power, just hydraulics).
$endgroup$
– Organic Marble
8 hours ago
1
$begingroup$
Sorry for the error about APUs electrical power, but to use the APUs to provide hydraulic power electric power is needed. So the APUs and the fuel cells should be fuelled and running to use the shuttle orbiter's control surfaces.
$endgroup$
– Uwe
7 hours ago
1
$begingroup$
related but different: This answer to ISRO's space plane on top of of a rocket - how unstable was it? suggests that its control surfaces were not operating during ascent.
$endgroup$
– uhoh
2 hours ago
1
1
$begingroup$
It would require the Shuttle apu to be fuelled and running to provide electric and hydraulic power for the operation of the rudder and elevons.
$endgroup$
– Uwe
8 hours ago
$begingroup$
It would require the Shuttle apu to be fuelled and running to provide electric and hydraulic power for the operation of the rudder and elevons.
$endgroup$
– Uwe
8 hours ago
$begingroup$
@Uwe is correct. The APUs were running for the drop tests, but not for ferry. (Slight correction - Shuttle APUs didn't provide electrical power, just hydraulics).
$endgroup$
– Organic Marble
8 hours ago
$begingroup$
@Uwe is correct. The APUs were running for the drop tests, but not for ferry. (Slight correction - Shuttle APUs didn't provide electrical power, just hydraulics).
$endgroup$
– Organic Marble
8 hours ago
1
1
$begingroup$
Sorry for the error about APUs electrical power, but to use the APUs to provide hydraulic power electric power is needed. So the APUs and the fuel cells should be fuelled and running to use the shuttle orbiter's control surfaces.
$endgroup$
– Uwe
7 hours ago
$begingroup$
Sorry for the error about APUs electrical power, but to use the APUs to provide hydraulic power electric power is needed. So the APUs and the fuel cells should be fuelled and running to use the shuttle orbiter's control surfaces.
$endgroup$
– Uwe
7 hours ago
1
1
$begingroup$
related but different: This answer to ISRO's space plane on top of of a rocket - how unstable was it? suggests that its control surfaces were not operating during ascent.
$endgroup$
– uhoh
2 hours ago
$begingroup$
related but different: This answer to ISRO's space plane on top of of a rocket - how unstable was it? suggests that its control surfaces were not operating during ascent.
$endgroup$
– uhoh
2 hours ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
For the Orbiter aerosurfaces to move, hydraulic pressure must be supplied from the Orbiter's Auxiliary Power Units (APUs) (a poor name for these critical devices - the name came from the analogous devices in aircraft!).
The APUs were not running for ferry flight, and control locks were installed to hold the elevons in a neutral position.
For the ferry flight configuration, the tail cone fairing is installed
on the orbiter to decrease aerodynamic drag and buffet, and
aerosurface control locks are added to the orbiter's elevons. The
orbiter is unmanned and the orbiter systems inert.
Source
Ferry locks are also referenced on p. 329 here and in step 393 (pdf page 189) here (note prior step to open the flipper doors)
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
$endgroup$
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
1
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
add a comment |
Your Answer
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1 Answer
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1 Answer
1
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oldest
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votes
$begingroup$
For the Orbiter aerosurfaces to move, hydraulic pressure must be supplied from the Orbiter's Auxiliary Power Units (APUs) (a poor name for these critical devices - the name came from the analogous devices in aircraft!).
The APUs were not running for ferry flight, and control locks were installed to hold the elevons in a neutral position.
For the ferry flight configuration, the tail cone fairing is installed
on the orbiter to decrease aerodynamic drag and buffet, and
aerosurface control locks are added to the orbiter's elevons. The
orbiter is unmanned and the orbiter systems inert.
Source
Ferry locks are also referenced on p. 329 here and in step 393 (pdf page 189) here (note prior step to open the flipper doors)
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
$endgroup$
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
1
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
add a comment |
$begingroup$
For the Orbiter aerosurfaces to move, hydraulic pressure must be supplied from the Orbiter's Auxiliary Power Units (APUs) (a poor name for these critical devices - the name came from the analogous devices in aircraft!).
The APUs were not running for ferry flight, and control locks were installed to hold the elevons in a neutral position.
For the ferry flight configuration, the tail cone fairing is installed
on the orbiter to decrease aerodynamic drag and buffet, and
aerosurface control locks are added to the orbiter's elevons. The
orbiter is unmanned and the orbiter systems inert.
Source
Ferry locks are also referenced on p. 329 here and in step 393 (pdf page 189) here (note prior step to open the flipper doors)
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
$endgroup$
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
1
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
add a comment |
$begingroup$
For the Orbiter aerosurfaces to move, hydraulic pressure must be supplied from the Orbiter's Auxiliary Power Units (APUs) (a poor name for these critical devices - the name came from the analogous devices in aircraft!).
The APUs were not running for ferry flight, and control locks were installed to hold the elevons in a neutral position.
For the ferry flight configuration, the tail cone fairing is installed
on the orbiter to decrease aerodynamic drag and buffet, and
aerosurface control locks are added to the orbiter's elevons. The
orbiter is unmanned and the orbiter systems inert.
Source
Ferry locks are also referenced on p. 329 here and in step 393 (pdf page 189) here (note prior step to open the flipper doors)
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
$endgroup$
For the Orbiter aerosurfaces to move, hydraulic pressure must be supplied from the Orbiter's Auxiliary Power Units (APUs) (a poor name for these critical devices - the name came from the analogous devices in aircraft!).
The APUs were not running for ferry flight, and control locks were installed to hold the elevons in a neutral position.
For the ferry flight configuration, the tail cone fairing is installed
on the orbiter to decrease aerodynamic drag and buffet, and
aerosurface control locks are added to the orbiter's elevons. The
orbiter is unmanned and the orbiter systems inert.
Source
Ferry locks are also referenced on p. 329 here and in step 393 (pdf page 189) here (note prior step to open the flipper doors)
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
edited 6 hours ago
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
answered 7 hours ago
Organic MarbleOrganic Marble
69.5k4 gold badges201 silver badges298 bronze badges
69.5k4 gold badges201 silver badges298 bronze badges
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
1
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
add a comment |
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
1
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
$begingroup$
Thank you, especially for the information about the ferry locks; that's the real answer. If they had really wanted to, they could have designed an umbilical to provide electrical and hydraulic power from the SCA. The decision to implement ferry locks meant such a measure wasn't necessary.
$endgroup$
– DrSheldon
7 hours ago
1
1
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
$begingroup$
@DrSheldon it would have been hugely complicated even with your umbilical - you'd have to have the flight computers powered up and running some ferry flight mode that didn't exist to provide elevon commands, something would have had to be providing cooling to the computers and to the aerosurface servoamplifiers, etc. Lock 'em down and be done with it.
$endgroup$
– Organic Marble
6 hours ago
add a comment |
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1
$begingroup$
It would require the Shuttle apu to be fuelled and running to provide electric and hydraulic power for the operation of the rudder and elevons.
$endgroup$
– Uwe
8 hours ago
$begingroup$
@Uwe is correct. The APUs were running for the drop tests, but not for ferry. (Slight correction - Shuttle APUs didn't provide electrical power, just hydraulics).
$endgroup$
– Organic Marble
8 hours ago
1
$begingroup$
Sorry for the error about APUs electrical power, but to use the APUs to provide hydraulic power electric power is needed. So the APUs and the fuel cells should be fuelled and running to use the shuttle orbiter's control surfaces.
$endgroup$
– Uwe
7 hours ago
1
$begingroup$
related but different: This answer to ISRO's space plane on top of of a rocket - how unstable was it? suggests that its control surfaces were not operating during ascent.
$endgroup$
– uhoh
2 hours ago