I have looked, and tried to figure out myself how to figure out the MAC on a three-piece wing. The center section is non tapered, while each wing tip tapers. Can someone explain how to figure out the MAC on this. Drawing included, but not sure how well it looks.

1/2 wingspan 34.5 inches
root chord, 12.25 inches
tip chord 7.5
tip setback 1.75
1/2 center section 7.875

Thanks

Doug

http://perso.wanadoo.fr/scherrer/mat...glish/mce.html

Thanks for the link Tall Paul, that answered my questions.

Doug