RE: ZIROLI 98
Thanks Billy,
My wing tubes are 1 1/4" in diameter.
With a one piece wing, you won't need any wing tubes (couldn't use one anyway with the dihedral).
A 50 size engine seems a little small for this size plane: a lot of pilots are happy putting a DA-85 up front on their Ziroli planes.
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Wings (cont)
3-piece conversion (cont)
Alignment pins:
I used some 1/4" diameter aluminum dowel from home depot to make alignment pins and some 1/4" thick ply for support. The inner wing, I drilled the 1/4" size hole but on the outer wings, I made the holes a little larger. I forgot to drill the holes before building the wing so the outer, larger hole allows me to wiggle the pin in the right position to align with the inner wing's hole. The back side hinge hard points were in the way so I had to drill into them to make room for the pin. Some epoxy and those are done.
Straps to hold the wings together.
Just some dubro straps and #4 screws on the bottom of wing along the main spar. A blind nut was epoxied on the inner wing's side. Nothing fancy as forces pulling out on the wings are very low: just something to keep them together.
I lucked out as the mating ribs are just about perfect aligning with themselves.
More sheeting:
Glued up more hard 3/32" thick balsa for sheeting the bottom of the wings.
Presently, I did just the front of the outer wings (main spar to LE) as there is no more work to be done there.
An L bar was useful in clamping along the main spar where localized clamping would be difficult.
Moving surfaces:
I cut off all the flaps and ailerons and sanded their LE's along with the inverted V along the TE of the wing behind the flaps.