The mainrotor, its balancing weight and its endcap.
The tailrotor, its balancing weight and both endcaps.
The gearbox used to convert the rotation of the horizontal shaft of the engine into the rotation of the vertical shaft of the mainrotor. It is the rear gearbox of a Honda GoldWing.
The pilots seat and its supporting construction. The stick is fixed whereas the seat slides and turns over the tube.
The shockabsorbers of the landing gear.
The lightweight muffler of the engine.
The 4-stroke engine which will power the helicopter.
A pilot needs a helmet.