AIRCRAFT ENGINE OIL TANK Russian patent published in 2000 - IPC

FIELD: combat and sports aircraft performing aerobatic manoeuvres. SUBSTANCE: oil tank has compartment for supply of oil to engine at negative load factors. This compartment is separated from oil tank by horizontal partition which is provided with centrifugal static air separator and replenishment passage. Air discharge passage of air separator is communicated with drainage cavity of oil tank through inertial-action disconnecting valve; axis of seat of this valve is parallel to vertical axis of aircraft. Gate of disconnecting valve is spring-loaded towards seat and spring is provided with device for control of precompression force. Replenishment passage is communicated with drainage cavity of oil tank inertial-action disconnecting valve with axis of its seat parallel to vertical axis of aircraft. Such construction of oil tank makes it possible to retain part of oil in compartment in performing aerobatic manoeuvres at negative load factors due to shutting-off the compartment replenishment passage and passage discharging air from air separator. EFFECT: enhanced efficiency of centrifugal twisting of oil-and-air emulsion at horizontal flight due to additional free volume inside air separator owing to forcing oil out of it through throttling air supply passage. 3 cl, 1 dwg