If helicopters didn't have tail rotors, they would spin in circles because they need a force pushing in the opposite direction as the main rotor.

And somewhat counterintuitively, the tail rotor can even be louder than the main rotor on smaller helicopters, according to Sinusas. The EDAT demonstrator. Bell.

You can observe this design on K-MAX helicopters, developed by Kaman Aerospace Company. Instead of just one main rotor, there are two, and they spin opposite each other to create lift for K-MAX ...

Helicopters are engineering marvels and provide a great deal of utility for the military and civilian services. The rotor system itself is an intricate system.

When main rotors – which spin above the helicopter to lift and push it forward – flex or dip down and essentially slice the helicopter in two while in midair, it's called a tail-boom strike.

Wieland Helicopter Technologies coaxial rotor design helicopters are more stable, more maneuverable, quieter and safer helicopter due to inclusion of a coaxial main rotor and exclusion of a tail ...

The main fuselage, which includes the cockpit and cabin, had already been recovered, the NTSB said. "Key components of the Bell 206 L-4 helicopter that crashed into the Hudson River last week were ...