ORIGINAL: wzak29
I need to cut thr dihedral of my PT-40 MKII I need to cut the LE, TE, Center spar there are two ways to do this
I can lay the wing flat and tilt the saw or I can stand the wing on the LE and TE and cock the saw to the left and right
to make the cut what would be best hardest part of my build.
I did this a while ago with a PT-40.
I cut mine with a jig saw, table saw would be better.
Once it was cut I sanded it and made 4 centre braces - LE, TE and two around the spar. I used good solid ply for this, the best I could find.
I fitted the braces and made it as tight as possible, using 30 min epoxy - lots of epoxy!
Once dried I filled in any gaps with balsa stock, again lots of epoxy.
I sanded everything down, and filled in any remaining gaps with expoy and micro balloons, then sanded again. Once that dried I put on a nice wide and think fiberglass cloth with epoxy.
The plane flew very will with the new wing. I put a OS .61 on it and it was a real missle. Sadly I made some other alterations after I did the wing, extending the elevator and rudder, I lost a control surface in flight and the plane went in, I never found it, but I am pretty sure the wing held together in the middle!
Good luck!