WING
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Your model will not fly well unless the wing is straight with no warps.
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Make sure you start with a flat - level building surface or use a Jig.
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If you do not have a jig obtain some 1 X 1 balsa and cut it into 8 pieces
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Tack glue the balsa to the building surface in the shape of the wing. Be sure that you place the jig blocks
between rib locations (4 pieces on leading edge and 4 pieces on trailing edge).
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Lay the leading edge, trailing edge and spars on the plans and mark rib positions on them
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Join formed leading and trailing edges as shown on plan and pin them to the jib blocks
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Pin ribs 1 and 10 to leading and trailing edge, square up the ribs and glue
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Install the rest of the ribs
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Fit the 1/4 x 1/4 balsa spars into the ribs
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The center section has 2 pieces of 1/4 x 1/4 between Ribs # 1 & # 2
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When satisfied that everything fits properly glue in place
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Sand the ribs from leading to trailing edge using a T-Bar sander to make sure all ribs taper properly
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Locate the Bellcrank mount, Bellcrank, lead out wires and 3/32" x 7-1/2" wire. If you wish to use a
plate-style Bellcrank mount drill a 3/16" hole in the 1/8 plywood Bellcrank mount where indicated on
the plans. Mount the Bellcrank to the plywood plate using the 6-32 bolt by inserting the bolt through
the plywood and Bellcrank. You can use an extra nut or washers between the plywood and the Bellcrank
to raise the Bellcrank high enough above the mounting plate to insure free movement of the wire
pushrod. It’s a good idea to install the lead out wires onto the Bellcrank now. Also drill out one of the
Bellcrank holes to accept the 3/32" pushrod wire.
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Bend the 3/32" wire at 90 degrees, clean the wire and solder a flat washer to the wire at the bend. Clean
off the wire and insert through the Bellcrank. Now solder a second flat washer to the wire on the other
side of the Bellcrank. Your wire pushrod should move freely with no binding. Place the Bellcrank onto
the 6-32 bolt and lock in place with the nut. A little glue or threadlock on the bolt will insure that your
Bellcrank will stay in place.
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Mount the Bellcrank so that the hole is 2" from the back of the leading edge
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Make sure everything moves freely with no binding and epoxy in place
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Use a # 11 blade to cut out the inboard ribs to allow the control cables to pass through each rib
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Run control cables through each inboard rib from Bellcrank to wing tip location
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Cut the 1/16 x 3 balsa center section sheeting to cover the center 4 ribs
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Cut a hole for the pushrod wire then glue in place
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You are now ready to turn the wing over
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Unpin the leading and trailing edges and turn wing upside down then pin in place
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Cut and epoxy 2 pieces of 1/4 x 1/4 scrap to edge of Bellcrank mount and Ribs # 1
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Cut the 1/16 x 3 balsa center section sheeting to cover the center 4 ribs
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Locate the adjustable weight box and assemble it. This box is designed to accept the Sig brand of 1/4
oz flat weights. Glue the two 3/4 x 3/4 sides to the 3/4 x 3/4 bottom. Glue the two 3/4 x 1 sides. Place
the 1/16 top plate in place and drill a 1/8" hole in the center of the top piece and the box bottom. Install
a 4-40 blind nut in the box bottom and glue it in place. Epoxy the weight box to the last rib and spar on
the bottom of the outboard wing
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When everything is completely dry remove the wing from the balsa blocks.
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