Browning .303 Cal. MG
Browning M2 50 Cal. MG
Mg 151/20 Cannon
M4 37 mm Cannon
Mk 108 Cannon
Earlier In 1914, French pilot Roland Garros developed metal deflector plates attached to the propeller that would deflect any bullet that hit the propeller when a gun was fired through the propeller arc. It was finally put into use in March 1915. Shortly thereafter on April 18, 1915, Garros shot down three German aircraft and he himself was forced down in Germen territory. Before he could burn his aircraft, it was captured and was sent to the German aviation military for evaluation.
This led to the invention of the interrupter mechanism by Anthony Fokker in 1915. This allowed full forward-firing , machine gun synchronization through the propeller arc without the bullets striking the blades. Although Fokker is credited for inventing the interrupter, his invention may have been based on a synchronizer invented earlier by Swiss engineer Franz Schneider in 1913.
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Created May 2, 2011. Updated December 23,2012.