|
It is indeed a vent pipe. The air that is forced out of the tank by the incoming fuel is heavy with fuel vapour, and is therefore extremely flammable. It is therefore safest to vent this 'air' (fuel vapour) as far as possible from the hot engine and exhaust systems. The vent pipe is clear, so that the refueller can see when liquid fuel starts to emerge from the tank, and so knows that the tank is full.
There is no vacuum effect. CART insist on gravity systems only.
|