Using what builder used, and is what is in paperwork. Just making sure I'm reading it correctlyThe datum line can be any point you want. It's just a reference.
I personally use the leading edge of the wing. In level flight attitude the leading edge of my wing is exactly in line with my wheels. Makes the math really easy. Anything multiplied by "0" is "0".
70" from leading edge. Measuring from wing root leading edge fwd, comes out roughly 4-5" fwd of spinner. Am I looking at this correctly? Thx DM
Ok. Thank you