Main rotor, tail rotor, drive shaft, engine and transmission, tail boom, cockpit and landing gear
Components of the sun are: (In bold are the two main components)HeliumHydrogenNitrogenMagnesiumOxygenCarbonIronSulfurSiliconNeon
The main lifting blades make up the rotor
The two main components of Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%). Together, they make up the majority of the gases present in the atmosphere.
The main rotor speed is reduced or increased
nitrogen and oxygen
Helicopter and airport
Helicopter and port
The two main elements that make up most of Earth's core are iron and nickel. These heavy metals are believed to be the primary components that give the core its dense and solid nature.
The power source, the thing it's turning on, and the wire to connect the power to the thing.
Some helicopter main rotor blades spin at roughly 185 rpm and extend out up to 20 ft so your question is subjective to the helicopter you are speaking of.
The motherboard.
The components that make up central nervous system consists of two main parts. The central nervous system is made up of the brain and the spinal cord.