How did machine guns fire through the propeller arc.
The Polikarpov I-16. (SN) machine guns synchronized to fire through the propeller. This type was however rejected in August 1939, and then the designation reused for the first I-16 version (otherwise the same as the type 10) capable of carrying drop tanks. These 93 l (25 US gal) tanks were designated PSB-21. Eighty aircraft of this specific type were delivered. Additionally, all I-16 types.
The problem back then: How do you let pilots shoot machine guns straight ahead without hitting the propeller blades right in front of them? Dutchman Anthony Fokker, an aviation guru, eventually came up with a solution for the Germans: Connect the gun to the propeller via an interrupter gear so that gunfire is halted whenever the blade is directly in front of the gun’s muzzle.
The British were first to mount forward-firing guns on the upper wing -- shooting over the propeller. But that made aiming hard, and it put the guns out of the pilot's easy reach when they jammed. The French took the next step. They put metal deflectors on the propeller so the pilot could fire straight through the blades, with a bullet glancing off now and then. That worked until crankshafts.
The Douglas A-26 Invader (designated B-26 between 1948 and 1965) is an American twin-engined light bomber and ground attack aircraft. Built by Douglas Aircraft Company during World War II, the Invader also saw service during several major Cold War conflicts. A limited number of highly modified United States Air Force aircraft served in Southeast Asia until 1969.
How early tech solved shooting a machine gun through a propeller. The Slo Mo Guys show how WWI fighter builders made it possible to shoot a machine gun through a plane's propeller.
A machine gun is a fully automatic mounted or portable firearm designed to fire rifle cartridges in rapid succession from an ammunition belt or magazine.Not all fully automatic firearms are machine guns. Submachine guns, rifles, assault rifles, battle rifles, shotguns, pistols or cannons may be capable of fully automatic fire, but are not designed for sustained fire.
Synchronization gear was invented in 1913, allowing pilots to shoot through the arc of a spinning propeller without their bullets striking the blades. The Slow Mo Guys slow down the effect and catch the mechanism in action.