Ed, still banging your head on the wall? Interesting.

With all this discussion on chord, why can't we have harmony?

Background> two points in space define a line; three points define a plane

The Chord is not parallel to the center line, since the incidence of the wing may not align with the fuselage center – a common practice in full scale aircraft.

The chord of the wing may not even be parallel across the entire wing - we call that wash-out or wash-in.

But if you take the entire airplane and section it in the vertical plane along the longitudinal axis, then translate that vertical plane out toward the wing tip, the cross section of the wing remains constant. Therefore, the wing is constant chord.

Wonderful language - English, eh?