An actual question my five year old asked me and I couldn’t answer, please help!
In: Physics
Propellers are matched to the engine output and that combo is matched to the aircraft.
A four-bladed prop of otherwise equal dimensions can impart twice the power of its two bladed version but it will be heavier and more expensive.
If you have fewer blades the setup will be lighter but you generally need to make the blades longer and some aircraft are too low to the ground to cope with that, so the designers will give them more blades at a reduced radius/chord length.
Latest Answers