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.
They commonly have one rotor and one propeller for stability .
It actually has two names (A) Tail Rotor (B) Antitorque Rotor.
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.