"Prop sync" redirects here. For the mechanism that enables a weapon to fire through the arc of a propeller, see Synchronization gear.

In aviation, propeller synchronization is a mechanism that automatically synchronizes all propellers of a multi-engine, propeller-driven aircraft so that they rotate at the same speed.

Propeller synchronization serves mainly to increase the comfort of crew and passengers, since its primary purpose is to reduce the “beats” generated by propellers that are turning at slightly different speeds. These beats can become very irritating to persons inside the aircraft after a time. Synchronization is not normally necessary for proper operation of the aircraft.

Some aircraft provide a visual indicator of propeller synchronization in the cockpit. Pilots can use this indicator to decide whether or not to engage propeller synchronization, or to help them synchronize propeller speeds manually.

Usage

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Operation of propeller synchronization can occur with a primary/secondary approach or with a push/pull technique associated with Type II systems. In Type II systems speed is increased for the side lower in RPM while at the same time speed is decreased on the faster RPM side. The net result is similar, but there is no primary or secondary, and no minute hunting typical of a Type I (primary/secondary) system. With a Type II system RPM cannot be reduced below manual speed settings so prop sync does not need to be "Off" during takeoff and landing. Type I systems MUST be off for takeoff and landings.

References

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📚 Artikel Terkait di Wikipedia

Synchronization gear

A synchronization gear (also known as a gun synchronizer or interrupter gear) was a device enabling a single-engine tractor-configuration aircraft to fire

Tractor configuration

synchronization gear was the Sopwith 1½ Strutter. which entered service in early 1916.[citation needed] The problem of firing through the propeller's

Synchronizer

transmission in an automobile Synchronization gear, a device that permits a gun to fire between the blades of a revolving airplane propeller Arbiter (electronics)

Ferenc Gebauer

adapting standard infantry machine guns was outmoded, as the propeller synchronization only controlled the timing, and not the operation, of these weapons

ShKAS machine gun

(1934) and wing-mounted (1935) KM-36, in flexible role (1935) and propeller-synchronized (1937); the latter had an extra-long barrel a 1941 model, wing-mounted

Ho-103 machine gun

Intelligence reports did not mention that this machine gun had a propeller synchronization flaw. Rottman, Page 22. Catalog of enemy ordnance material. Report

MG 15

gun is ready to fire, and is thus unsuitable for "through the propeller" synchronized forward firing on a fuselage mount.[citation needed] Pulling the

ShVAK cannon

I-16 aircraft, all produced in January 1939, were armed with the propeller-synchronized version of the 12.7 mm ShVAK; this short series was given the I-16