Top-flite TOPA0135 User Manual download pdf (Page 37)

❏ ❏ 18. Mark the location of the wing dowels from

inside the wing. Remove the wing center LE and

drill 1/4" holes at the marks. Hint: Use a sharpened

1/4" brass tube to mark the location and to “punch”

the holes–it really does a clean job. Do not glue

the wing center LE in place yet.

❏ ❏ 19. Test fit, but do not glue, the 1/4" x 5-3/8"

wing dowels with the wing center LE. Make

adjustments if required then remove the dowels

and the wing center LE. Hint: Slightly round the

front of the dowels to allow them to plug into

the fuselage.

Proceed to step 21 if installing

retractible landing gear.

❏ ❏ 20. Test fit both prebent 3/16" landing gear

wires in the landing gear blocks. Temporarily

mount the landing gear wires to the wing with the

nylon straps and #2 x 3/8" screws as shown on the

wing plan. Hint: Remove the balsa sheeting from

under the straps so they will be inset in the bottom

of the wing.

❏ ❏ 21. Make the cutouts in the bottom wing skin

for the retracts. It’s easiest to first make the cutout

for the retract mount and strut without the wheel.

Mount the wheel to the strut and make the cutout

for the wheel. Allow more clearance behind the

wheel than in front of the wheel–the more

clearance the less trouble you are likely to have at

the flying field with the retracts hanging up in the

wheel well (3/32" - 1/4" behind the wheel

is realistic).

❏ ❏ 22

. Now is a good time to fuelproof inside the

wheel wells where you will not be able to reach with

a paint brush after the top wing sheeting is in place.

NOTE: If you elect to coat the inside of the wheel

wells later, it must be done before the covering is

applied. The paint tends to soak through the wing

skin which can blemish the covering.

❏ ❏ 23. If you plan to make the outboard drop

tanks releasable, install the cables and the

mechanism now. The instructions included with the

drop tanks include general information on how to

hookup the release system and cables.

❏ ❏ 24. If you haven’t already done so, remove

the remaining jig tabs. Use a sanding block on the

upper surfaces of the wing to blend all the ribs,

spars and trailing edges. Inspect all glue joints and

add CA to any joints that don’t look strong.

SHEET THE TOP OF THE WING

The top of the wing will be sheeted in four sections

like the bottom of the wing.

❏

1. Temporarily reinstall the 1/4" wing dowels in

the wing. Locate the die-cut 1/8" plywood Leading

Edge Jigs, Trailing Edge Jigs (A) and (B), and the

Tip Jigs. Assemble the trailing edge jig (A) and (B).

❏ 2. Place the leading edge jigs onto the dowels

and set the wing on your flat building table with the

trailing edge jig in the center of the wing under the

trailing edge. Hint: Tack glue the jigs in position.

❏ 3. Place the die-cut 1/8" plywood tip jigs under

each wing tip directly under ribs W-11. The tabs at

the aft edge of the tip jigs should contact the

trailing edge of the ailerons at W-11. Now the wing

is ready for sheeting.

❏ 4. Make the upper forward skin halves just like

you made the bottom forward skin halves. Save the

large scraps for the upper aft sheeting.

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Top-flite TOPA0135 User Manual Page 37

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