- #1
Kalagaraz
- 28
- 0
I'm having a tiny debate with someone over whether a 2nd coaxial rotor generates additional lift for a helicopter by itself or the helicopter has additional lift only due to the elimination of the tail rotor so 100% power goes to generating lift?
My theory is that it does not generate additional lift in and by itself or if it does very minimal. I base this on the theory that the 1st rotor accelerates the air to high speed giving very little additional energy the 2nd rotor can add to the air to accelerate it to more to generate additional lift. So the 2nd rotor's only purpose is to eliminate the need for a tail rotor and generate additional lift by having more power from engine.
The counter argument is that the 2nd rotor does generate additional lift beyond that of simply the extra power from engine. He said something about friction I don't know wasn't really paying attention.
My theory is that it does not generate additional lift in and by itself or if it does very minimal. I base this on the theory that the 1st rotor accelerates the air to high speed giving very little additional energy the 2nd rotor can add to the air to accelerate it to more to generate additional lift. So the 2nd rotor's only purpose is to eliminate the need for a tail rotor and generate additional lift by having more power from engine.
The counter argument is that the 2nd rotor does generate additional lift beyond that of simply the extra power from engine. He said something about friction I don't know wasn't really paying attention.