Originally Posted by
43Inches
Looking at the fuel system schematics on the Chipmunk they do seem to have solved this by having the fuel selector position lower than the tanks. So there is still a gravity feed to where the lines join and the selector, from the sump outlet, as well as built in non return valves in the tank outlets.
FWIW, here's the pic of the fuel system for the Chipmunk: They speak of a 'flexible fuel tank'.. presumably a bladder tank which may reduce the amount of air available to get into the system?
How I wish they drew detailed and clear diagrams like these in the AFM for the PA-28's.. but that's progress I suppose
