Special-shaped flexible oil tank structure and method suitable for Y-shaped air inlet channel aircraft

The invention discloses a special-shaped flexible oil tank structure suitable for an aviation aircraft with a Y-shaped air inlet channel and a mounting method of the special-shaped flexible oil tank structure. The oil tank structure comprises an oil tank main body made of a flexible material, left and right breather pipes capable of being repeatedly disassembled and assembled, and an oil outlet pipe and an oil inlet pipe connected with the oil tank main body. The shape of the fuel tank body is attached to a special-shaped inner cavity formed by a Y-shaped air inlet channel in the aircraft, and a closed section is designed above the air inlet channel to adapt to internal space division. Through the flexible design of the fuel tank body, the fuel tank can be flattened to be conveniently placed when not filled with fuel oil, the shape of the fuel tank can be restored at the installation position, and the fuel tank can be precisely attached to the interior of the aircraft. Due to the design of the fuel tank, the