Top-flite TOPA0135 User Manual download pdf (Page 19)

❏ 5. Use a string, pinned to the center of the top

stringer at F-1, to equalize the distance of the stab

tips to the nose. Hint: An alternate method to the

“string and pin” technique, is to extend the line on

the plans showing the trailing edge of the stab,

then align the stab with this line. Use a pen and a

straightedge to draw the line.

❏ 6. Accurately draw a centerline along the length

of the fin post (or use the same centerline

previously drawn for hinging). Fit the fin into the

stab and fuselage, then clamp the rear of the

fuselage sides together. Use a triangle to confirm

that the fin is perpendicular to the work surface.

When it’s time to glue the fin to the fuse and stab,

masking tape may be used to hold the fin in

position while the epoxy cures.

❏

7. Double check all alignments. Permanently glue

the fin and stab in position with 30-minute epoxy.

COMPLETE THE FUSE TOP

RAZORBACK VERSION:

Perform steps 8 through 13 only if you are building

the Razorback version.

However, if you are installing the optional cockpit

kit (no matter which version you are building), skip

ahead and perform steps 3 & 4 on page 21 before

you glue the top fuse sheeting in position.

❏ 8. Trim the shaped 15" balsa Fuselage Spine

to fit between the leading edge of the fin and the aft

edge of the Razor Spine then glue it to the formers.

Bevel the sides of the Razor Spine so it blends with

the curvature of the formers. (See cross section on

fuselage plan.)

❏ 9. Use the template on the plans to make a

Right and a Left Aft Fuselage Top from two

3/32" x 3" x 30" balsa sheets. Start by fitting the

bottom edge of one of the top sheets to the side

sheet, on the fuselage. Position the top sheet on

the fuselage and mark where it will be notched for

the Razor Spine.

❏ 10.

Cut the notch in the top of the sheet so it will

fit against the Razor Spine and fuselage spine. Wet

the inside portion of the sheet that bends inward

towards the fuselage and wet the outside of the

portion of the sheet that bends around the formers.

Hint: The best way to make the sheeting conform to

the compound curves of the Razorback is to liberally

wet the sheet then place it on the fuselage and little

by little bend it into position. Wet, then reposition the

sheet on the fuselage a few times continuously

bending it to shape each time. Let the sheet dry for a

few minutes before permanently gluing it. Glue the

aft top sheet to the fuselage.

❏ 11. Trim the top edge of the sheet where it

meets the Razor Spine and fuselage spine. Glue

the other aft top sheet to the fuselage in the same

manner as the first.

❏ 12. Position the 1/2" x 1-1/4" x 8" Aft Deck Top

Block on the Razor Spine and trace its outline.

Carve the top block to approximate shape, then

glue it in position.

❏ 13. Glue a 1-1/4" wide strip of 3/32" balsa to the

cockpit sides joining the front deck. Refer to the

cross section and side view on the plans then use

a razor plane and a sanding block to blend the aft

deck top block to the fuselage. Cut out the canopy

and use it as a guide to accurately shape the

top block.

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Top-flite TOPA0135 User Manual Page 19

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