you can also put a 12mm dia Gardena PVC tube in the tank via the filler neck.
Improves dramatically the venting while filling up!
Concerning the vent tube, there is a mod to have it end at the top forward
front
of the tank (basicaly a ca 25cm long aluminium tube which is glued into the alu
piece). You can than fix the Gardena tube onto this alu tube and have it end
also
at the top front end of the tank.
Filling up the tank (80 ltrs) will then take just four to five minutes minutes,
instead of the 15-20 min with lots of spilling it took me before.....
Klaus
Graham Singleton wrote:
> >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
>
|