FlightChops on MSN

Watch how constant speed props hold 2,700 RPM - "Automatic control"

Constant speed propellers were designed to keep engine RPM stable, often around 2,700 RPM, even as flight conditions changed.
insider.si.edu

Rotol Spitfire Propeller Blade, Constant-Speed, Wood and Metal

The famous British Supermarine Spitfire used various propellers during its early service. Rotol Airscrews, Ltd was formed in 1937 as a joint venture of Rolls-Royce and Bristol. The name, a combination ...