there are a few twin rotor helicopters. The Chinook is possibly most famous.
The circumference of a helicopter propeller can vary depending on the size and type of helicopter. Generally, the circumference of a helicopter propeller can range from a few feet to several feet in length.
The rotor is like the engine to the propeller. A propeller is the fan like blades on the top that spin to make the helicopter fly.
The tail propeller keeps the helicopter straight.
1957
A flying machine with a rotor an a propeller is a helicopter
That is a twin rotor helicopter
Aircraft do have propellers , unless they are jets.
I believe that would be the Mil-26
no a helicopter is not a airplane because helicopter lifts but a plane takes off and a helicopters propeller is huger than a planes
It is called a rotor, and it more closely resembles a wing than a propeller blade
the engines make the propeller spin and will make it fly
That is a twin rotoe helicopter