You are ASSUMING it behaves this way, but the assumption is not correct.

Your Nextar behaves just like the video. Have a look.


Physics says that to maintain the fuel in the back of the tank, you need about 1G of acceleration. So if the nose is pointed down, and the plane is accelerating at 1G, the acceleration is canceled and the fuel is free floating... to make it "stick" to the back, you need 2G's acceleration.

Do the math and you'll find that none of our planes can even begin to approach this rate of change, nor the resultant velocities involved.

Don't confuse G loading with the acceleration needed to maintain a 1G inverted environment within the fuel tank.

The video makes all of this much easier to follow.


Your engine WILL stall in a prolonged dive, if you let it, particularly if you keep the throttle up, once the clunk becomes uncovered.

To simulate what happens on your plane in a dive, run your plane up while it is level, then pull the engine off to idle. This loads up fuel into the carb and lines making the engine go rich as well... then put it nose down. Eventually it will lean out and shut off, but it will take a while.... then double the amount of time it took, because in flight your engine is unloaded due to the air flowing past the prop.

Your Nexstar doesn't SEEM to die, because you are not holding it nose down in flight long enough for it to die.


However on my aerobatic planes, I've had this problem doing extremely long and slow downlines... blenders, etc... which prompted the original discussion in an even earlier thread.