How do helicopters with two rotors operate?

All helicopters have two rotors… The main rotor and a tail rotor. This is the Bell 206 “Long Ranger” - It's one of the most commonly seen and easily recognized helicopter in the world. I know what you're talking about but… hear me out one second. read more

Now that you have a basic idea of what each rotors do in a normal helicopter, the answer for this baby would be much more curt. The design is called “Tandem Rotor”, while normal helicopter used the “Single main rotor” design. read more

Advancing blade speed is rotor speed + helicopters speed, Retreating blade speed is rotor speed - helicopter speed, which at high speed will result in the retreating blade to be moving too slow to create lift and results in Retreating blade stall. read more

Later, in 1843, he sketches plans for a full-scale helicopter with two rotors, but the steam engines available at that time are much too heavy to power it. 1880s: American inventor genius Thomas Edison (1847–1931) experiments with model helicopters, including some driven by electricity, his favorite source of power. read more