An actual question my five year old asked me and I couldn’t answer, please help!
In: Physics
Right up my alley because I’m about to do this for a living.
There are two big reasons props have more or less blades. One is ground clearance and two, power dissipation.
You know how some cars can be slow, but some are really fast? The slow car has less power than the fast one. So the same goes for propellers. The slow ones have two blades and the fast have three, four or even five. The more powerful the engine, the more blades you can have.
The other has to do with how high the engine is off the ground. The lower the engine is to the ground, the smaller the propeller is.
The big reason you don’t see huge two blade propellers on aircraft is because they’d be too close to the ground and they’d break apart if they started turning.
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