Bill, The fuel system in a Coupe is rather simple but different. Also there are some differences among different aircraft depending on serial numbers. Basically, the two wing tanks are interconnected and on level ground you should have close to equal levels between these two tanks at all times. The fuel is pumped from the wings to the header tank at a rate greater than the fuel consumption. Any excess in the header is returned to the wing tanks. The various causes of venting fuel from the tanks include blockage of the fuel lines and loose fuel tank caps. Another source of fuel venting is filling the wing tanks to the brim and then climbing steeply at full power after take off. I usually fill the wing tanks to a half inch below the brim to allow for flow back from the header overflow.
If you post the serial number of the aircraft, I'm sure that some of the more experienced coupers will be able to comment with ideas specific to the aircraft. John Roach N 2427H wmc1467 wrote: > > Hello Coupers! My name is Bill and I am new to the airplane. My > friend Ron just purchased one and I ferried it home and have been > helping shine it up and checking him out in it. When I flew it home we > topped both mains and the header was approx 3/4 full. Shortly after > takeoff I noticed fuel venting from the left tank at the gasket. We > replaced the gaskets, filled the left tank only and flew with no > leaks/venting. The right tank was empty. Today we flew and topped both > wing tanks and we had venting from the left tank again. A possible > related factor is that for the second time the left tank only took 3 > gals leaving 6 that did not feed to the header. Once we noticed the > venting we landed and checked both tanks and they were equal in > quantity. Any info will be greatly appreciated. We are having fun > with the little bird although being a tail-dragger guy, I feel as if I > had a stroke not having rudder pedals. > Thanks, > Bill > >
