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Ralph:: You have aroused my curiosity, (the extent of my arousal these days!) and I am going out to look over my fuel system in order to put my mind at rest. (a continuing problem these days!) My serial # is 96, what is the serial # of your airplane? I don't know if that is any indication or not but I always thought they were pretty close. Wayne Woollard ----- Original Message ----- From: "R M Finch" <[EMAIL PROTECTED]> To: "'Ercoupe Technical Discussion (moderated)'" <[email protected]> Sent: Sunday, September 14, 2003 8:00 AM Subject: [COUPERS-TECH] RE: Alon fuel caps and tanks > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > Maybe that's it. Consider: > > - Fuel levels and pressures in all tanks are normal and atmospheric. > - During the day, as temperatures rise, the air and gasoline in the > tanks heat and expand. > - The header tank can harmlessly vent air out its pinhole vent; but > my wing tanks have no vent. The only openings they have are the > supply line to the header tank (through a valve and a pump), and > the return line between header tank and wing tank(s). I don't know > if both wing tanks are connected to the header; or if the wing tanks > are connected between themselves, and then one wing tank to the > header. > - The supply line always has gasoline in it because it must be at a low > point in the wing tank. > - The return line has gasoline in it, but connects at high points in > both > tanks, right? It must be so from the header tank, but perhaps not at > the wing tank. This makes a crucial difference. If the return line > connects low at the wing tank, then the wing tank, when its air and > gasoline heat and expand, will push gasoline into the header; but if > the return line connects high, then it should push air into the > header, > if not plugged. If plugged, the only outlet is the supply line, which > will always have gasoline. > > > From: "Wayne" <[EMAIL PROTECTED]> > > To: "R M Finch" <[EMAIL PROTECTED]>, "'Ercoupe Technical > > Discussion \(moderated\)'" <[email protected]> > > Reply-To: "Wayne" <[EMAIL PROTECTED]> > > Subject: Re: [COUPERS-TECH] Re: Alon Fuel Caps > > > > Hi Ralph:: > > > > I went to an impeccable resource to obtain the answer (Ask > > Jeeves) Who > > sez:: the density of gasoline will change with increasing > > temperature since > > its volume increases but not its mass. > > I would think that the overflow vent in your Alon is plugged > > or sumpin. The > > overflow vent is visible just below the neck in the header tank. > > > ========================================================================== == == > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers-tech/ > > > > > ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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