G'day dspeers,

Yep with a uniflow tank the pressure at the pick up clunk and therefore the spray bar remains constant from a full tank to empty. The pressure at the spray bar is obviousely different to the pick up pressure and will change if the tank is raised or lowered.

You are right about the change in head pressure in a vertical climb, it's worst in a 3D type hover and not as bad in a vertical climb with reducing airspeed (less than 1:1 power to weight ratio). A loop is not bad at all because the force is mainly centripetal, the head pressure changes very little in this case.

Regarding your last question, yes this would flood the muffler when throttling down on a vertical descent... exactly the same as a normal two or three line tank would. However the rest of the time it would avoid flooding the tank when throttling down which a uniflow tank would otherwise do.

Welcome aboard,

Dave H