Top Flite T-34B MENTOR, User Manual

Page: 31 / 66

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9. Cut the flap root and tip end templates
from the plan. Glue them to the ends of the flap with
rubber cement or spray adhesive. Use the templates
as a guide to shape the flap LE with a razor plane or
a hobby carving knife followed by a bar sander.
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10. Drill a 1/16” [1.6mm] hole through the punch
mark in the front of the flap horn for the clevis. Add a
few drops of thin CA to the hole. After the CA
hardens redrill the hole. Remove the flap LE you tack
glued on. Insert the flap horn into the flap and
securely glue it in place. Permanently glue the flap
LE to the flap.
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11. Assemble the die-cut 1/8” [3.2mm] plywood
flap hinge drill guides by gluing the pieces together
as shown. Optional: Glue a piece of 7/32” [5.6mm]
brass tubing (3/16” I.D. [4.8mm]) to the hinge drill
guides to guide your drill even better.
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12. Position the wing flap hinge drill guide on
the wing over each hinge block (you marked them
before you sheeted the bottom of the wing) and drill
3/16” [4.8mm] holes 1-1/8” [28.6mm] deep for the
Hinge Points.
Hint: Instead of using a drill bit, use a
piece of 3/16” brass tube sharpened at one end to
drill holes with clean edges.
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13. Insert three #309 Robart Super Hinge
Points into the holes in the wing but do not glue them
in. Fit the flap to the wing and mark the locations of
the hinge points on the flap.
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14. Use the flap hinge drill guide to drill holes
in the flap the same way you did for the wing.
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15. Cut 1/4” [6.4mm] off the end of the outermost
hinge point that fits into the flap. Test fit the flaps to the
wing with the hinge points. Adjust the position (depth) of
the hinges until the flap aligns with the wing the same
way it was before you cut it loose. Make adjustments
until the flap fits the wing and freely moves about its
range of motion. Strive for a good fit where the top of the
flap meets the top of the wing.
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16. Return to step 1 on page 30 and mount the
other flap to the wing the same way.
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