At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.

It is like a dream to feel the machine lift you gently up in the air, float smoothly over one spot.

It 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.

According to recognized aero technical tests, the bumblebee cannot fly because of the shape and weight of his body in relation to the total wing area. The bumblebee doesn't know this, so he goes ahead and flies anyway.

Money lost-nothing lost, Health lost-little lost, Spirit lost-everything lost.

If you are in trouble anywhere in the world, an airplane can fly over and drop flowers, but a helicopter can land and save your life.

This machine was a failure to the extent that it could not fly. In other respects it was a very important and necessary stepping stone.