rotor

«rotor» in Mova's school dictionary: a part of a machine that turns round and round, such as… — its meaning for a pupil, its sense in the lessons and examples, with 2 sentences of Mova's corpora that use it.

part of speech

noun (a rotor, rotors)

meaning for a pupil

1) A rotor is a part of a machine that turns round and round, such as the blades on top of a helicopter. tree →

2) A rotor is the spinning part inside an electric motor or generator. tree →

3) In a wind turbine, the rotor is the hub with its blades that the wind turns. tree →

sense in the lessons

In science and design lessons, helicopters fly because their rotor blades push air down; a tail rotor stops the helicopter from spinning. In lessons on energy, wind turbine rotors turn a generator to make electricity. Pupils make paper «helicopters» (spinners) to test rotors and air resistance. Phrases: «rotor blades», «tail rotor», «main rotor».

examples

• The helicopter's rotor began to spin. tree →
• The tail rotor stops the helicopter turning round. tree →
• The wind turned the rotor of the turbine. tree →
• Inside the motor, the rotor spins very fast. tree →
• We dropped paper rotors from the stairs and timed them. tree →
• Stay away from the rotor blades when the helicopter lands. tree →

note

Countable. The word «rotor» is a palindrome: it reads the same backwards. The part of a motor that does not move is called the stator. Related words: rotate, rotation.

In the corpora

• A helicopter's rotor blades are long thin wings that spin; the small tail rotor stops the body spinning the other way.
• A drone flies with four or more small rotors spinning at different speeds, and some hold their place in the air using GPS.

Trees and pragmatics

Every meaning and example of «rotor» parsed by Mova, each sentence with its dependency tree and frames.