If both wing tank caps are not IDENTICAL one tank will pressurize and overflow the other. I had a RAIN-PRUF fuel gage installed on my left tank and the original Ercoupe cap on the right and the right tank would overflow. Craig N2623H [EMAIL PROTECTED] wrote: > In the early days of ownership of my Coupe, I noticed that the right > hand > tank did > leak out of the vent. After careful observation of the situation, I > noticed > that if > I tightened the cap fully to the stop, the vent opening was about 10 > degrees > right > of center. The fuel would just stream out of it. Next time up, I made > certain that > the vent rib was exactly parallel with the centerline of the plane. > Leaking > stopped. It is my theory that if the vent opening is straight forward, > the > air > impact creates a pressurization of the tank, thus stopping overflow. > Could > be wrong > here, but it just seems that way. > > Larry > > Dick Chevalier wrote: > > > I was working on the Forney left tank fuel gauge today. The problem > > came > to > > light when I filled both tanks today for the first time in a long time. > The > > lens was cracked and gas leaked through it until I drained the tank. > > But > > that's not what I am curious about. > > > > It seems (and I could be mistaken) that the fuel from both wing tanks > > tee > > together, feed the fuel pump which feeds the fuel to the header tank and > the > > excess goes to the left tank. I have tested this theory by putting some > gas > > in the right tank only (my home tank is nearer the right tank as I pull > the > > plane out of the hangar) and immediately go fly. The header builds up > > its > > "head" of fuel while flying, and then the right tank is mostly empty and > the > > bulk of the new fuel is in the left tank. Now here is the question: > > > > Why doesn't the right tank overflow through the vented cap assuming all > > three tanks are nearly full\??? > > > > Dick in NM > > > > > __________________________________________________________________________ __ > > ____ > > To unsubscribe from this list please send > mailto:[EMAIL PROTECTED] > > ___________________________________________________________ > > T O P I C A The Email You Want. http://www.topica.com/t/16 > > Newsletters, Tips and Discussions on Your Favorite Topics > >
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