Grainger & heedm
Thanks for the input.
Perhaps Stepniewski was ambidextrous. Perhaps when writing the two books, the left hand didn't know what the right hand was doing.
Bad joke.
If 'thrust' is used for the vector perpendicular to the tip path plane and 'lift' is the vertical component, would 'push' or 'pull' be an appropriate word for the horizontal component(s)?