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
The three main components of an ATP molecule are a sugar molecule called ribose, a nitrogenous base called adenine, and three phosphate groups.
Carbohydrates are made up of three main components: carbon, hydrogen, and oxygen. These elements combine to form simple sugars, such as glucose, which are the building blocks of carbohydrates.
Helicopter and airport
Helicopter and port
nitrogen and oxygen
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 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.