How strong someone should be in order to fly without servo assisted hydraulics?How should control surfaces be modeled in simulations?Why do most commercial airplanes use hydraulics instead of electric/servo motors?Can an F-16 fly with conventional hydraulic powered controls without a computer controlled Fly By Wire System?How to fly a parabolic arc?How its like to fly an big back airliner with an sidestick ? How sensitive is the “joystick”?How does hydraulic actuator servo valve feedback work?How are the services kept running on a plane without an APU?How strong would a servo motor need to be to power the control surfaces of a fixed wing ultralight aircraft?How can an airplane roll, yaw and pitch up and down without control surfaces?
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How strong someone should be in order to fly without servo assisted hydraulics?
How should control surfaces be modeled in simulations?Why do most commercial airplanes use hydraulics instead of electric/servo motors?Can an F-16 fly with conventional hydraulic powered controls without a computer controlled Fly By Wire System?How to fly a parabolic arc?How its like to fly an big back airliner with an sidestick ? How sensitive is the “joystick”?How does hydraulic actuator servo valve feedback work?How are the services kept running on a plane without an APU?How strong would a servo motor need to be to power the control surfaces of a fixed wing ultralight aircraft?How can an airplane roll, yaw and pitch up and down without control surfaces?
$begingroup$
Planes these days use fly by wire systems while older ones had a mix of hydraulics with electronic assistance like the MD-11 (And maybe 737-800?).
But what would happen if you lost the electronic systems and you had to fly manually? I remember an incident of this happening in a MD-11.
So How much raw muscle power is needed to fly an MD-11 or an 737-800 without assistance for 10 minutes and then land? Through two pilots or as a single person.
flight-controls aircraft-systems hydraulic-system
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
$endgroup$
add a comment |
$begingroup$
Planes these days use fly by wire systems while older ones had a mix of hydraulics with electronic assistance like the MD-11 (And maybe 737-800?).
But what would happen if you lost the electronic systems and you had to fly manually? I remember an incident of this happening in a MD-11.
So How much raw muscle power is needed to fly an MD-11 or an 737-800 without assistance for 10 minutes and then land? Through two pilots or as a single person.
flight-controls aircraft-systems hydraulic-system
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
$endgroup$
add a comment |
$begingroup$
Planes these days use fly by wire systems while older ones had a mix of hydraulics with electronic assistance like the MD-11 (And maybe 737-800?).
But what would happen if you lost the electronic systems and you had to fly manually? I remember an incident of this happening in a MD-11.
So How much raw muscle power is needed to fly an MD-11 or an 737-800 without assistance for 10 minutes and then land? Through two pilots or as a single person.
flight-controls aircraft-systems hydraulic-system
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
$endgroup$
Planes these days use fly by wire systems while older ones had a mix of hydraulics with electronic assistance like the MD-11 (And maybe 737-800?).
But what would happen if you lost the electronic systems and you had to fly manually? I remember an incident of this happening in a MD-11.
So How much raw muscle power is needed to fly an MD-11 or an 737-800 without assistance for 10 minutes and then land? Through two pilots or as a single person.
flight-controls aircraft-systems hydraulic-system
flight-controls aircraft-systems hydraulic-system
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
asked 8 hours ago
Jonathan IronsJonathan Irons
1,52211132
1,52211132
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
You can't. Most of these airplanes are flown with hydraulically powered control surfaces with no mechanical input possible from the cockpit flight controls. The flight controls just operate servo control valves in the hydraulic actuators, like the bucket on a front end loader but a little fancier. If it's FBW, the FBW system does the same thing at the actuators using torque motors operated by the FBW computers to drive the servo control valves.
There will be two, or three, hydraulic actuators driving each control surface. The flight controls in the cockpit just control the extension/retraction of the actuators. Control feel in these airplane comes from spring devices in the control circuit to simulate "air loads". There is no direct connection between the pilot and the dynamic forces acting on the control surface. If you lose all of the hydraulic actuators, you lose the control surface.
answered 7 hours ago
John KJohn K
31.5k153103
$endgroup$
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
add a comment |
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1 Answer
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1 Answer
1
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oldest
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$begingroup$
You can't. Most of these airplanes are flown with hydraulically powered control surfaces with no mechanical input possible from the cockpit flight controls. The flight controls just operate servo control valves in the hydraulic actuators, like the bucket on a front end loader but a little fancier. If it's FBW, the FBW system does the same thing at the actuators using torque motors operated by the FBW computers to drive the servo control valves.
There will be two, or three, hydraulic actuators driving each control surface. The flight controls in the cockpit just control the extension/retraction of the actuators. Control feel in these airplane comes from spring devices in the control circuit to simulate "air loads". There is no direct connection between the pilot and the dynamic forces acting on the control surface. If you lose all of the hydraulic actuators, you lose the control surface.
answered 7 hours ago
John KJohn K
31.5k153103
$endgroup$
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
add a comment |
$begingroup$
You can't. Most of these airplanes are flown with hydraulically powered control surfaces with no mechanical input possible from the cockpit flight controls. The flight controls just operate servo control valves in the hydraulic actuators, like the bucket on a front end loader but a little fancier. If it's FBW, the FBW system does the same thing at the actuators using torque motors operated by the FBW computers to drive the servo control valves.
There will be two, or three, hydraulic actuators driving each control surface. The flight controls in the cockpit just control the extension/retraction of the actuators. Control feel in these airplane comes from spring devices in the control circuit to simulate "air loads". There is no direct connection between the pilot and the dynamic forces acting on the control surface. If you lose all of the hydraulic actuators, you lose the control surface.
answered 7 hours ago
John KJohn K
31.5k153103
$endgroup$
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
add a comment |
$begingroup$
You can't. Most of these airplanes are flown with hydraulically powered control surfaces with no mechanical input possible from the cockpit flight controls. The flight controls just operate servo control valves in the hydraulic actuators, like the bucket on a front end loader but a little fancier. If it's FBW, the FBW system does the same thing at the actuators using torque motors operated by the FBW computers to drive the servo control valves.
There will be two, or three, hydraulic actuators driving each control surface. The flight controls in the cockpit just control the extension/retraction of the actuators. Control feel in these airplane comes from spring devices in the control circuit to simulate "air loads". There is no direct connection between the pilot and the dynamic forces acting on the control surface. If you lose all of the hydraulic actuators, you lose the control surface.
answered 7 hours ago
John KJohn K
31.5k153103
$endgroup$
You can't. Most of these airplanes are flown with hydraulically powered control surfaces with no mechanical input possible from the cockpit flight controls. The flight controls just operate servo control valves in the hydraulic actuators, like the bucket on a front end loader but a little fancier. If it's FBW, the FBW system does the same thing at the actuators using torque motors operated by the FBW computers to drive the servo control valves.
There will be two, or three, hydraulic actuators driving each control surface. The flight controls in the cockpit just control the extension/retraction of the actuators. Control feel in these airplane comes from spring devices in the control circuit to simulate "air loads". There is no direct connection between the pilot and the dynamic forces acting on the control surface. If you lose all of the hydraulic actuators, you lose the control surface.
answered 7 hours ago
John KJohn K
31.5k153103
answered 7 hours ago
John KJohn K
31.5k153103
answered 7 hours ago
John KJohn K
31.5k153103
answered 7 hours ago
John KJohn K
31.5k153103
31.5k153103
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
add a comment |
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
There is no feedback from aeroforces - if there is hydraulic pressure. If no hydraulic pressure, there is feedback through the servo valve deadband.
$endgroup$
– Koyovis
3 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
$begingroup$
Technically yes but you won't be able to effectively control the surface with whatever leverage you are able to apply mechanically to the PCU piston when you bottom out the servo valve input lever.
$endgroup$
– John K
2 hours ago
add a comment |
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