Airplane machine guns were synchronized to shoot between propellers

Auf dem Justierstand.
Zur Kontrolle des durch den Propellerkreis schießenden MG wird eine [Holz-] Scheibe an den Propellerflügel angebracht, an der dann die Einschüsse zu sehen sind.

In earlier warfare, airplanes with mounted machine guns were synchronized with the spinning blades of the propeller so the bullets could shoot in between revolutions.

“…it can fire through the arc of its spinning propeller without bullets striking the blades. The idea presupposes a fixed armament directed by aiming the aircraft in which it is fitted at the target, rather than aiming the gun independently.”

Source: Wikipedia


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