Introduction to the Helicopter

These flashcards cover key concepts and terminology related to helicopters, their components, and flight mechanics.

What is a helicopter classified as?

A helicopter is classified as rotorcraft or rotary-wing aircraft.

What provides lift to a helicopter?

Lift is provided by rotor blades rotating around a mast.

Who coined the term ‘helicopter’?

The term ‘helicopter’ was coined by Gustave de Ponton d’Amécourt in 1861.

What historical significance did Igor Sikorsky have in helicopter design?

Igor Sikorsky designed the first successful helicopter that reached full-scale production.

What is the K-225 known for?

The K-225 became the first turbine-powered helicopter in the world on December 11, 1951.

Name some uses for helicopters.

Helicopters are used for transportation, construction, firefighting, search and rescue, among others.

What is the role of the rotor system in a helicopter?

The rotor system generates lift, allowing the helicopter to hover and maneuver.

What is the function of the tail rotor?

The tail rotor counteracts the torque produced by the main rotor.

What are the primary flight controls of a helicopter?

The primary flight controls are cyclic, collective, antitorque pedals, and throttle.

Describe the cyclic control.

The cyclic control varies the pitch of rotor blades to change the helicopter's direction.

What does the collective control do?

The collective control changes the pitch angle of all rotor blades simultaneously.

Why is hovering considered difficult?

Hovering requires constant adjustments due to the helicopter generating its own gusty air.

What advantage do tandem rotor helicopters have?

They can hold more weight with shorter blades and use all engine power for lift.

What does the term ‘antitorque’ refer to?

Antitorque refers to the design that counteracts the torque effect due to rotor rotation.

What is a coaxial rotor configuration?

Coaxial rotors consist of two rotors turning in opposite directions on the same axis.

How does a tail rotor help in flight?

It pushes or pulls against the tail to control the rotational direction of the helicopter.