日本89式7.7mm双联航空机枪是日军在二战时装备在飞机上的一种武器,其采用导气式工作原理,闭锁机构为楔闩横动式。该枪发射7.7×58mm半突缘枪弹,单枪质量11.8kg,初速747m/s,射速750～900发/分,采用弹鼓供弹。本文以枪身与弹鼓结构为主线,揭示该枪的内外构造…… Japanese 89 7.7mm twin aircraft gun is the Japanese military during World War II equipped with a weapon on the plane, which uses the principle of gas-conducting, locking mechanism for the wedge latch cross-type. The gun fired 7.7 × 58mm semi-flanged bullets, single-gun mass 11.8kg, muzzle velocity 747m / s, firing rate of 750 to 900 rounds / min, the use of a cartridge for the bomb. This article takes the gun body and the drum structure as the main line, revealing the internal and external structure of the gun ......