Upright Rolling

Upright Rolling

Can a jet fly inverted for an extended amount of time?

Say there is a Boeing 737, and it rolls over to expose the belly of the aircraft. Now say it stays there for, lets say, 1 minute. If the pilot can set the pitch and hold the nose upright, will the aircraft sustain lift? Maybe that won't be a problem, but since the engines are using hydraulic fluids could the fluids continue to supply the engines?
Note that I am not talking about a roll, which I am sure is possible.

(PS: I dont want to know if a fighter jet can fly upside down, I mean passenger jets )
You say I am offended by you don?
Um, no.

I think fuel would be your biggest problem. All engines mounted below the wing (where fuel is stored) can gravity feed to keep fuel moving to the engine driven fuel pumps. Remaining upside down would not allow you to maintain 1 postive "G" on the aircraft and it's fluids, and after a short time the fuel manifold would drain. The electric fuel pumps are normally mounted in the lowest part of the tanks and being inverted would undoubtely expose them, rendering them useless. Yes, Tex Johnston rolled the "Dash 80" (707 prototype) in a classic 1 G barrell roll.

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Upright Rolling

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