What is the primary purpose of the transmission in a helicopter?

• A. To increase fuel efficiency
• B. To transmit power from engines to rotors
• C. To reduce noise during flight
• D. To regulate rotor speed

Answer: (B)

The primary purpose of the transmission in a helicopter is to transmit power from the engines to the rotors. The transmission system plays a crucial role in converting the engine's output into mechanical power that drives the rotor systems. In helicopters, the rotors are essential for generating lift and allowing for flight, making the transmission a vital component for the overall operation of the aircraft.

The transmission accommodates the various operating speeds and torque levels produced by the engines, allowing for efficient power delivery. Additionally, the system can include gear ratios that help to optimize rotor speed and performance in different flight conditions. It's fundamental to understand that without a transmission effectively transferring power, the helicopter would be unable to take off, maneuver, or maintain stable flight.