So,Doodles, what you are saying, is that unless the blades are totally
flat, the term "feathering" can not be used?

otn

let me help improve, over the knee, with your understanding of English words.

v. feath·ered, feath·er·ing, feath·ers

v. tr.
To turn (an oar blade) almost horizontal as it is carried back after each
stroke.

To alter the pitch of (a propeller) so that the chords of the blades are
parallel with the line of flight.