RE: MR Aerodesign 1/4 Scale Mudry CAP 10b Review / Build
Left Wing
Prepare the angle of the center section:
With a bit of geometry, knowing the length of the center section and that the dihedral angle is 6 degrees, we can calculate how much to raise the right hand end. Mine come out about 1.2"
As the plywood tabs are hard to pin, I secured the center section with my trusty bag of lead!
First laminate the main spars form 3/6" x 1/2" basswood, noticing where they go from double layer to single layer.
Test fit all the ribs and rib assemblies.
I noticed a problem here:
W3A is not cut at all correctly and you need to us on of the neighboring ribs as a template to make it fit correctly. See picture.
Use the assembled flap hinge/hangers to gauge the width of the supporting ribs and tack glue the supports in place.
Now slide all the pieces to the assembly and glue with 30min epoxy. Make sure to keep everything square and not to get any extra glue in the flap hing boxes or the landing gear block area.
We can now glue in the top spar with 30min epoxy.
Working form the root to the tip add all the other ribs, glue the top spar first then carefully raising the bottom spar to meet the rib, pinning the structure down as you go.
Add the 1/4" square balsa spars and the the sheer webbing.
Sand the leading and trailing edges of the ribs even and add the 3/32" balsa leading edge and sand to shape.
Add the 1/4" balsa training edge and sand top edge to shape.
Carefully sand the structure to make sure all the spars are level wit the ribs and start sheeting..
Start form the middle out, lighty spritzing the wood with Windex to help it form to the structure.
I left the sheeting over the flap area open for now so I can figure our what to do there, I still need to make the flaps!
let the structure dry then remove form the bench.
Turn upside down and remove all tabs on the left wing panel. Do not remove the center section tabs yet.
Add the servo hatch rails. Remember to install the aileron servo extension at this time.
Sheet the bottom being very careful not to twist the structure.
That's it for now, I think I need to build the flaps!