Backwash Causes Lift?

Mxsmanic wrote in
:

writes:

There is nothing after leaving the rotor disk to change the direction
of air flow.

The airplane, helicopter, gyrocopter, and gyroplane all fly straight
and level for the same reason and it isn't air being deflected
downward.

No heavier-than-air aircraft flies without deflecting air downward,


Yes, they can, and do.

Dynamic lift is usually at play but is by no means required.

Bertie