The function of airplane ventilation tank and how to refuel.

I learn to fly. Aircraft system is a very complicated subject. We haven't learned much, and there is a gap between us and the cast. I hope the answer will satisfy you.

Answer your question from the type of fuel system.

(1) The fuel system of modern aircraft mainly includes three types: single-engine selective fuel supply system, double-engine independent and cross-ship fuel supply system, and multi-manifold fuel supply system. At present, most civil transport aircraft have two engines or four engines, so the latter two fuel supply methods are chosen, and there is no order when refueling, because under the latter two fuel supply methods, the fuel tank can be connected to maintain the balance and stability of the aircraft.

(2) The purpose of the breather tank is as follows: 1 To prevent excessive positive pressure from being generated in the tank during refueling; 2 to prevent negative pressure caused by oil consumption; 3. The ventilation tank can discharge fuel vapor from the tank to prevent explosion.