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421 - ATPL - The main advantage of a constant speed propeller as compared to a fixed pitch propeller is a:

Question 421 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Constant efficiency in the whole speed range of the aeroplane.
Lower propeller blade stress.
High efficiency in a much wider speed range of the aeroplane.
Higher efficiency in cruising range.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license