My Kitfox model IV 1200 doesn't have an aux pump. I was thinking of putting one in.
I was told that a certified engine should flow fuel from the pump even if the pump fails, its a function of gravity. I have seen stuff on the forum about testing fuel flow so, I decided to test the theory and was amazed that NO fuel comes out of the "fuel out" side of the pump when I disconnected the hose.
The fuel shutoff is in the "on" position, the tanks have over 1/4 full and the tail was up on a saw horse in the flying attitude.
I tipped the nose of the plane almost to the floor before fuel started to flow freely from the pump.
My header tank is located on the floor behind the passenger seat. It IS lower than the pump but doesn't the fuel in the wing tanks create enough head pressure to push flow out of the header tank to the pump?
Do I NEED a header tank?