ATPL: The "constant speed propeller" has:
Domanda 449, Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license
| Its Best Efficiency During Climb. |
| In general a worse efficiency than the fixed propeller. |
| Only above and below the design point a better efficiency than the fixed propeller with the same design speed. |
| Only At The Design Speed A Better Efficiency Than The Fixed Propeller. |
