How can fighter jets fly upside-down in regards to the fuel intake

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Me and my brother are at a loss, we understand the basics of how the upside down thing works, but how does the engine get fuel when the tank is turned around, is it a vacoom and how would that work or is the intake from the tank in the back of the it, so the fuel is forced into the engine? Thanks.

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24 Answers

Anonymous 0 Comments

Some jets have a small compartment inside the bottom of their engine feed fuel tanks.  This has a check valve in the top to allow fuel to enter but not leave.  Inside there is usually a turbine pump of some kind to pump fuel to the engines.  When the jet is inverted there is enough fuel to sustain engine operation for a short time, but it will always limit how long a jet can be inverted as this fuel will be limited until the jet levels out again.

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