Top-flite TOPA0135 User Manual download pdf (Page 43)

❏ 11. (Optional) Use the template on the plans to

make two sets of wing fillet braces from left over

1/8" lite ply. Glue the braces to the fillet and the

fuselage sides. This will make the fillet more

durable in case of rough handling during transport.

❏ 12. To make finishing of the fillet easier, remove

the wing from the fuselage. Cut a tapered piece of

1/16" sheet balsa as shown in the photos. Test fit it

against the wing saddle and refine the fit. A little

concave curvature on the side that contacts the

plywood wing fillet helps.

❏ 13. Make another of sheet balsa to fit behind the

first piece in the “corner” of the fillet. These pieces

don’t have to fit very accurately; we are just trying

to fill some of the space and save a little on the

amount of filler.

❏ 14. Now the fun part! Get out the balsa filler

(Hobbico HobbyLite recommended) and begin

building up a smooth fillet. This should be done in

at least three layers letting the previous layer fully

dry before applying the next. Hint: Wet your fingers

when forming the final layers and you will really be

able to “feather in” the fillet to the fuselage. This

will require minimal sanding in the end.

BUILD THE WING BELLY PAN

❏ 1. Bolt the wing to the fuselage and set the

model upside down on your building stand.

Reference the plans for the locations of the die-cut

1/8" plywood Belly Formers 3-C and 4-C then

mark their position on the bottom of the wing.

❏ 2. Test fit 5-E and make sure that when in

position at the trailing edge of the wing, it is the

same height as 5-D. Make adjustments to 5-E if

required then glue it to the wing only. Cut a 3/16"

square stringer to fit between 5-E and F-1. Glue

the stringer to 5-E and F-1 only.

❏ 3. Position 2-C, 3-C and 4-C, under the stringer

at their proper locations. You may have to bevel

the lower aft edge of 2-C so it will fit between the

wing and F-2. Glue 3-C and 4-C but not 2-C to

the wing.

❏ 4. Place two more 3/16" stringers in the notches

from 5-E to F-1 then glue the stringers to all the

formers except 2-C.

❏ 5. Adjust the position of 2-C so you can place a

shim such as a metal ruler or a piece of 1/32"

plywood between 2-C and F-2. Glue 2-C to the

stringers and the wing.

Skip to step 1 “Sheet the Belly Pan” if you are not

going to install the releasable drop tank.

❏ 6. Glue a 3/16" square stringer to the side of the

middle stringer between 2-C and 3-C (just like you

did for the tail wheel installation). Cut a notch in the

middle stringer to allow actuation of the Great

Planes release mechanism (remove the aft post

from the release mechanism). Glue another 3/16"

stringer to the other side of the middle stringer.

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Top-flite TOPA0135 User Manual Page 43

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