Sheet The Boom - GREAT PLANES Profile 38 Instruction Manual

5. Pin the boom main frame, elevator and rudder
servo tray and the fin frame to your building board over the
boom plan. Glue the F1 and F2 fin frames together.
6. From the 1/4" x 1/4" x 30" [6mm x 6mm x 762mm]
balsa sticks, cut and glue an upper and lower boom frame
between the boom main frame, servo tray and the fin.
7. From the 1/4" x 1/2" x 24" [6mm x 13mm x 610mm]
balsa stick, cut and glue the fin trailing edge and lower
brace to the fin frame.
8. From 1/8" x 1/4" x 24" [3mm x 6mm x 610mm] balsa
sticks, cut and glue diagonal boom braces and fin ribs to
the boom frame.
9. Glue two of the die-cut 1/8" [3mm] balsa aft fins
(F4) together. Glue the aft fin to the trailing edge of the fin.
Note the direction of the wood grain.
10. Remove the boom from your building board and
return to step 2 and build the second boom.

Sheet the Boom

1. Remove the boom from your building board. Use a
bar sander to sand both sides of the boom even.
2. Position the boom on top of a 1/16" x 3" x 30"
[1.6mm x 76mm x 762mm] balsa sheet. Align the sheet with
the front and top of the boom. Draw a line on the balsa sheet
along the bottom of the boom.
20