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Thanks, very well described. --- [EMAIL PROTECTED] wrote: > Jim, > > there are several versions of the Ercoupe fuel > system, but all work about the > same.. > > Fuel is sucked by the fuel pump from the right wing > tank, and pumps into the > header tank. The outlet of the fuel pump is > restricted to a flow of about 7 > gal/hr. As the cpoupe consumes about 5 to 6 gal hr, > as the header tank fills > up, there is an overflow line back to the wing tank. > Some versions go to the > left tank, some to the rt tank. The wing tanks are > hooked together, with a > line under the seat. > > Fuel flows by gravity to the carburetter. > > Some wing tanks have guages mounted inside the > cockpit, and some utilize > float guages. The header tank has a float guage. > > In my opinion, the only guage that has any meaning > is the header tank guage. > If it starts to fall, this means the fuel pump has > failed, or the wing tanks > are dry..... and you have about an hours amount of > fuel in the header....Find > a field and land, and refuel. > > Of course one should check the amount of fuel in the > wing tanks before any > flight, so one can estimate total flight > time....But, if the fuel pump fails, > then the only available fuel is in the header. > > System is simple and works very well.. > > An AD on the Fuel pump requires annual inspection of > the pump screen and > water sump. Often the pump is not re-assembled > properly...cover not > tightened to torque specs...and it sucks in air...., > and there fore no longer > works. In most cases this is fixed by proper torqing > the cover hold down > bolt, but often pilots do not observe the header > tank float guage dropping > until the engine quits....this can be Bad News... > > The Ad is required because fuel contaminated with > water is trapped in the > fuel pump; and in cold weather it will freeze > bursting the pump, or corrosion > contaminates the pump valves. I have tried Univair > to STC an additional > gascolater between the wing tank and the fuel pump. > Thisw would remove any > water in the fuel lines, and make the Fuel Pump AD > un-necessary... > > Harry Francis > Blacksburg, VA. ===== Jim Howell Uptight39 Gruman OV-1 Mohawker __________________________________________________ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ __________________________________________________ To unsubscribe from this list please send mailto:[EMAIL PROTECTED] ____________________________________________________________ T O P I C A -- Learn More. Surf Less. Newsletters, Tips and Discussions on Topics You Choose. http://www.topica.com/partner/tag01
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