Graham, Why do we want to put the fuel return up at the vent fitting rather
than down at the reserve side fuel outlet?
Kevin A211
-----Original Message-----
Behalf Of Graham Singleton
Subject: Re: Fuel tank sight gauge routing
>I did mine that way and have just tried to fill the tank. It blew gas out
>the single vent on top of the fuselage at about 12 gallons. The tank was
>not full(according to the visual tube by the seat). Did not try putting
any
>more gas in the tank. I am still trying to figure what the problem is. I
>have the tee connection just aft of the tank. I can't figure how gas got
up
>in the vent tube well before the tank was full. Seems to me it would be
>ideal for the vent tube to be long enough to go forward to the front top of
>the tank since the tail is lower and that is the likely last place for air
>when sitting on the ground.
>Ken Carpenter
>A123 MonoMG
Ken,
I think part of the problem is the size of the vent line, too small. I am
planning using 1/2" line up to the vent, teed in to the XS filler moulding
to allow quicker filling and syphon break, then onward through 1/4" pipe to
the breather which could be above or below the fuselage. Havn't tried it
yet but I have made the tank fitting to enable it.
(3 NPT holes for tank breather, sight gauge breather and fuel return.
Graham
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