Use this another way-
Petrol (gas) engines don't need pressurized tank, put a oneway valve in the gas tank air vent, if you set it the correct way round now it allows air IN to the tank when engine is running, but when you get the plane back home and stand it on it's nose the residual gas doesn't p*ss all over the garage floor
Last edited by smr2ley; 08-21-2018 at 04:14 AM.
Reason: spelinng