The tail rotor is tilted to the side. Therefore it has a slight vertical
component to its thrust.

Perhaps, the tilt was a tentative step by Sikorsky toward having both rotors
face upward, and both contributing to lift.

The world's first production helicopters had two main rotors.
(http://www.unicopter.com/0474.html &
http://avia.russian.ee/vertigo/focke_drache-r.html). IMHO, rotorcraft
configurations will move away from the tail rotor and back to where they
should have been all along.


Peter Seddon" wrote in message
And what are the main engines rated at then? I am intrigued as I had
expected the tail to take no more than 10% of total power.