Shaping fuselage sides. Outlines are printed on the 1/8 hard balsa sides. 1/16 ply was CA'd after drilling holes. Square stock glued on the top and bottom and stack sanded to match them up.
The kit was short on engine stick, so I ripped some hard maple from my stock. I added an engine crutch, I put it in all models now. It makes it easy to locate and drill mounting holes. I used transfer punches to locate the mounting holes and drilled them accurately.
One the crutch is done, the sides were popped in a jig. The crutch was glued in upside down.
Sig supplies a molded set of flap and elevator horns. I cut up an old one, and will not use it. I need to a set. The horns are flexy and and the little kink in the horn wire isn't enough to prevent rotation.
The chipmunk is good value and a great airplane but I am spoiled now by modern CAD based designed. The spar slots need trimmed and shimmed to get good alignment.
The wood density varied to very hard to only slightly hard. The very hard wood was right on the ribs that hold the gear blocks so that is where you would use real hard wood. bottom side Trailing edge sheeting held on with weights
Now the real advantage of the jig, I can flip it over and keep everything in place
This is a build log of a super chipmunk build.
Will use the adjusto jig I obtained from Peter.
Day one was to remove the wing ribs and drill jig hole for the adjusto jig wires.
Sig didnt semd me the contest balsa on this one. and some of the ribs are laser cut and some die cut. Very strange.
Think I am going to like using the jig, although it is a pain to set up.
Knockouts for leadout wire were secured with tape and 5/32" holes were drilled for the jig wires taking care not to be near the spars. Made a jig out of scrap pine to locate the jig holes.
Olympic II done
Ok not a Control line project, but this was waiting for me. Recover and repair an old Olympic II glider and add electric power to it.
This is a Cragists list find. I always wanted one. Early RC flying I remember an Olympic 99 with a enya 09 on a wing pylon. This is the later Olympic II and the power is a .10 sized out runner on the nose.
Bright colors and one contrasting wing panel for visibility. A low KV 10 sized motor wont give rocket ship performance but it will get it up there. Need a battery and some nice clear weather