Helicopter Components, Section and System
Airframe
-The airframe, or fundamental structure, of a helicopter can be made of either metal, wood, or
composite materials, or some combination of the two. Typically, a composite component consists of
many layers of fiber-impregnated resins, bonded to form a smooth panel. Tubular and sheet metal
substructures are usually made of aluminum, though stainless steel or titanium are sometimes used in
areas subject to higher stress or heat.
FUSELAGE
-it is the outer core of the airframe.
-it is an aircraft's main body section that houses the Cabin that holds the CREW, PASSENGERS and
CARGO.
-fuselage house the engine, the transmission, avionics, flight control and the powerplant.
Helicopter Cabin seating arrangement:
1. Two seats in the front.
2. Two seats in the rear facing backward.
3. Three seats in the rear facing forward.
4. Three front seats facing forward in a stadium style seating.
5. Four back seats facing forward in a stadium style seating.
MAIN ROTOR SYSTEM
-is the rotating part of a helicopter which generates lift.
- main rotor systems are classified according to how the main rotor blades are attached and more
relative to the main rotor hub.
Mast- a hallow cylindrical metal shaft which extends upward and sometimes supported by the
transmission.
Hub- it located at the top of the mast and attached the rotor blade.
Two Classification of Main Rotor System:
1. Semirigid
2. Rigid (fully articulated)
