Helicopter Components Overview

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What does Water Line (WL) measure?

Height in inches perpendicular from a horizontal plane (correct)

Distance from the wingspan

Width of the tail fin

Depth of the fuselage

How is Aileron Station (AS) measured?

Outboard and parallel to the inboard edge of the aileron (correct)

Diagonally across the wing

Perpendicular to the fuselage

Parallel to the front beam of the wing

What is Flap Station (FS) measured perpendicular to?

The rear beam of the wing (correct)

The horizontal stabilizer

The vertical stabilizer

The cockpit floor

What other measurements might be used on large aircraft, in addition to location stations?

Horizontal stabilizer stations (HSS) Signup and view all the answers

How are zones used to locate components on air transport aircraft?

By assigning sequential numbers to different parts of the aircraft Signup and view all the answers

What should be consulted before locating a point on a particular aircraft?

Manufacturer’s terminology and station location system Signup and view all the answers

What materials can the airframe of a helicopter be made of?

Metal or wood composite materials Signup and view all the answers

Which material is typically used for tubular and sheet metal substructures in helicopter construction?

Aluminum Signup and view all the answers

What type of structure are helicopter fuselages and tail booms often made of?

Truss-type or semimonocoque structures of stress-skin design Signup and view all the answers

Which components are typically made of aluminum in helicopter construction?

Tubular and sheet metal substructures Signup and view all the answers

What aspects are included in airframe design for helicopters?

Engineering, aerodynamics, materials technology, and manufacturing methods Signup and view all the answers

In which areas are titanium or stainless steel sometimes used in helicopter construction?

Areas subject to higher stress or heat Signup and view all the answers

What is the purpose of a stall fence on the upper surface of a wing?

To halt spanwise flow of air and maintain proper chordwise airflow Signup and view all the answers

What material is usually used for firewalls and engine decks in modern helicopter fuselage design?

Stainless steel Signup and view all the answers

Why is a gap seal commonly used between the stationary trailing edge and movable control surface(s) of a wing?

To promote smooth airflow and prevent disruption of airflow Signup and view all the answers

Why are landing gear skids mentioned as a simple option for helicopters?

To lower maintenance costs Signup and view all the answers

What is the purpose of vortex generators on the wing of a Symphony SA-160 aircraft?

To ensure aileron effectiveness through the stall Signup and view all the answers

What type of engines are generally used in smaller helicopters?

Reciprocating engines Signup and view all the answers

Why are fixed gear landing systems common in simple aircraft that fly at low speeds?

To support the aircraft during landing and while it is on the ground Signup and view all the answers

Why are most training helicopters equipped with reciprocating engines?

For simplicity and cost-effectiveness Signup and view all the answers

Which type of helicopters commonly use turbine engines due to their power output?

Twin-engine helicopters Signup and view all the answers

What feature is crucial in helicopter design due to the multidirectional nature of flight?

Wide-range visibility from the flight deck Signup and view all the answers

What are the major components of a helicopter as mentioned in the text?

Airframe, fuselage, landing gear, antitorque system Signup and view all the answers

What is the purpose of the exhaust outlets in a helicopter according to the text?

To release expended gases that contribute to the helicopter's forward motion Signup and view all the answers

Which component of a gas turbine engine on helicopters compresses the air drawn into it?

Compressor Signup and view all the answers

How does a common type filter in a gas turbine engine reduce foreign object debris ingestion?

By ejecting debris outward prior to entering the compressor Signup and view all the answers

What is the function of the combustion chamber in a gas turbine engine on helicopters?

To inject atomized fuel into the air Signup and view all the answers

Approximately how much of the incoming airflow in a gas turbine engine on helicopters is used to cool the engine?

~75% Signup and view all the answers