Bill, As I have uneven fuel feed issues with my wingtanks, I am always interested in discussion about Ercoupe fuel system tank plumbing/venting/caps, etc. There has been much said on this forum about the simple, but sometimes confusing, fuel system in Ercoupes with lots of very good information made available by you and others; i.e. new gaskets, clear vent holes, fuel lines routed and connected correctly, etc., etc. But I believe this is the first time I have read about "NOT" having vented caps on 415-CD and D wing tanks. Can you provide us with a reference source about not having vented caps on CD and D models? All of my Ercoupe reference books/manuals pertain to the 415-C, which is why I ask about a reference source. Maybe I have been missing this information somewhere.
N3378H, s/n 4003 was manufactured in October 1946 as a C, assembled & converted to a CD in December 1947, and converted to a D in October 1990. The overflow from the header tank has a T fitting routing overflow fuel to both wing tanks. After a flight there is a difference of 2 -3 gallons in fuel levels between the wing tanks. Sometimes more depending on how long the flight is. If I swap caps between the tanks, the fuel level difference follows; i.e. after a flight the left tank is more full than the right; when I swap caps and fly the next time, the right tank is more full than the left. If it is correct that I should not have vented caps, does anyone have a couple of unvented wing tank caps they want to trade for vented caps? I have 4 of them. Bill, et al, thank you for all of your help. As always, AIM HIGH! FLY SAFE! Willie Topken N3378H '46 ERCO 415-D Ercoupe @ 1NV1 http://www.airnav.com/airport/1NV1 <http://www.airnav.com/airport/1NV1> --- In [email protected], William R. Bayne <ercog...@...> wrote: > > All, > > Ed is correct. Wing tanks were NOT vented beginning with the 415-D and > the subsequent 415-CD. On > these models each wing tank vent to the header tank via individual > overflow lines. > > Over a hundred 415-C airframes still unsold by dealers when the 415-CD > was announced were fully > factory-converted to full 415-CD model specification (including the > above piping). > > These airframes received new 415-CD data plates. The date stamped was > the date of conversion. > They should have unvented wing tank caps, as should any airframe that > routes header tank overflow > to both wing tanks. > > Regards, > > William R. Bayne > .____|-(o)-|____. > (Copyright 2009) >
