contraprop

A technician inspects the contraprop on a large aircraft engine.

Definition

1. Noun:
   • Counter-rotating propeller: A "contraprop" (short for contra-rotating propeller) is a type of aircraft or marine propeller system in which two sets of blades rotate in opposite directions around the same axis, designed to improve efficiency and reduce torque effects.

Usage Examples

• Noun:
  • The new aircraft model features a contraprop to enhance fuel efficiency. (A dual-propeller system with opposite rotations.)
  • Engineers studied the contraprop's performance in reducing vibration. (The mechanical system of counter-rotating blades.)

Advanced Usage

• "Contraprop system": The complete assembly of two coaxial propellers that spin in opposite directions.

  • The contraprop system on the torpedo allowed for faster, more stable underwater travel. (The dual-propeller mechanism.)

• "Contraprop design": The engineering specifications for such a propeller arrangement.

  • The contraprop design eliminates the need for a tail rotor in some helicopters. (The technical layout of counter-rotating blades.)

Variants and Related Words

• Contra-rotating (adj): rotating in opposite directions.

  • The contra-rotating fans in the engine increased thrust. (Fans that spin opposite to each other.)

• Propeller (n): a device with rotating blades that propels a vehicle.

  • The ship's propeller was damaged, but the contraprop remained intact. (A standard single-rotor blade system.)

Synonyms

• Counter-rotating propeller: a propeller system where two sets of blades turn in opposite directions.
• Coaxial propeller: two propellers mounted on the same axis but rotating oppositely.

Related Idioms

• (No common idioms directly use "contraprop"; the term is technical and specific to engineering contexts.)