The words 'rotor' and 'propeller' are nouns, singular, common, concrete nouns; word for things.
It is called a rotor, and it more closely resembles a wing than a propeller blade
A flying machine with a rotor an a propeller is a helicopter
The rotor is like the engine to the propeller. A propeller is the fan like blades on the top that spin to make the helicopter fly.
rotor
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1957
Propellers is a noun. It's the plural form of propeller.
It is the main rotor of a helicopter that acts to lift and thrust the craft through the air. A link is provided below.
It actually has two names (A) Tail Rotor (B) Antitorque Rotor.
They commonly have one rotor and one propeller for stability .
They change the speed and angle of rotor, and speed of tail propeller.
By tilting the main rotor and changing the speed of the tail propeller.