The top part of a helicopter would most commonly be considered the rotor blades (which spin to provide lift).
the rotor
It is called a rotor, and it more closely resembles a wing than a propeller blade
The thing that spins at the top of a helicopter is called the rotor blade. It provides the lift necessary for the helicopter to take off and stay in flight. The rotor blades are attached to the main rotor mast and are powered by the engine.
Rotor blades are on top of a helicopter.
The top part of a wave is called the crest, while the bottom part is called the trough.
The top part of a tornado is called "the top"
The first helicopter was called the VS-300.
The rotor is the hub and main blades on top of every helicopter.
The top part of a dress is called the bodice.
My Sims Agents Questions-Where is the helicopter? the helicopter is at you head quarters and is on the very top floor
the blade is called rotor bladesThe rotor blades on top are called Main Rotor Blades, because they are the main source of lift for the helicopter. The smaller rotor blades on the tail are called Tail Rotor Blades.
The bottom part of your hand is the Palmar sideand the top part is the Dorsal side.