T&J Monocoupe 90A Assembly Instructions Manual - page 3
Monocoupe 90A
Page 3 Copyright © 2016 Jim Young and T& J Models
Flip the structures over and cap the other
side with 1/32” balsa. The rudder and
elevator L.E. dowels can be substituted
with rectangular stock for non-scale
hinges.
Glue the 1/16” plywood control horn in
place. Sand the edges round and
temporarily hinge the control surfaces.
Wings
Cut 1/8”x1/4" spruce main spars and
rear spars to length. If you have a
warped spar, use it for the bottom spar
with the warp curving up. Make left and
right spar assemblies with the spar
joiners glued between the spars. For the
right wing, the joiners should be toward
the L.E. and for the left wing the joiners
should be toward the T.E.
Locate the spar assemblies over the
plans. The bottom main spar will be
slightly off the board, so just pin it to
hold it in position. Use the dihedral
gauge to set the angle of R3 and glue in
place. Glue the remaining ribs in place
using the flap and aileron mounts to
space the R6’s and R9’s. Glue the 1/4”
balsa L.E. in place. The 1/8” balsa T.E.
is square to the board from R3 to R8,
and then angled from R8 to the wing tip.
Add balsa gussets as shown on the plans.
Cut and glue vertical grain sheer webs
between the top and bottom main spars
from R6 to the second R9. Trim the
laminated wing tip to fit and glue in
place. Glue the top sheeting as shown
on the plans. Cap strip the ribs and T.E.
with 1/16”x1/8” balsa.