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Roger.
Do you have the Ercoupe Memoranda and service
Bulletins at hand?
In Memorandum #43 you can see the different fuel
systems and also some drawings on how the lines should be layed out . I can not
see many S turns there, if at all.
From the perspective of flow in pipes, every
corner takes away flow energy. However, a slight bend is much easier to overcome
than a sharp 90 degree angle.
Hartmut
----- Original Message -----From: roger andersonSent: Saturday, January 31, 2004 2:24 PMSubject: [COUPERS-TECH] Header tank overflow----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----As I continue to research the issue of my nose tank occasionally venting fuel while at idle, I followed the routing of the overflow line under the panel and down the left side just forward of the seat. I found that the line has been formed into a fairly large "S" prior to ending at the fitting on the left tank. This "S" creates a trap similar to a sink drain. Why is this trap bent into the overflow line? What purpose does it serve? I would appear that it creates considerable resistance in the fuel trying to enter the overflow line and return to the wing tank. Also, I can imagine that over the years it may have become partially clogged with sediment and whatever. Tomorrow I will remove the line and clean it out completely. Hopefully it will then permit a better return of the overflow fuel. However, any thoughts on this or experiences with it are appreciated. Thanks...Roger============================================================================== 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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