It is like a dream to feel the machine lift you gently up in the air, float smoothly over one spot.
Igor SikorskyThe helicopter appeared so reluctant to fly forward that we even considered turning the pilot's seat around and letting it fly backward.
Igor SikorskyThis machine was a failure to the extent that it could not fly. In other respects it was a very important and necessary stepping stone.
Igor SikorskyIt would be right to state that, with the successful flight of the XR-4 in the summer of 1942, the helicopter became a reality in the United States.
Igor Sikorsky