Top Flite TOPA0410 - Manual (Page 10)

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❏ 10. Place one of the stab skins on your building board.
Apply an even bead of medium or thick CA to one side of
the stab framework. Place the framework on the stab skin
and press it down firmly until the glue has set.
❏ 11. From the 1/2" x 1/2" x 30" balsa stick, cut and glue
1" [25.4mm ) long hinge blocks to the trailing edge of the
stab and stab skin at the locations shown on the stab
plan. Sand the hinge blocks flush with the TE.
❏ 12. Glue the second stab skin to the stab framework.
❏ 13. Trim the top and bottom stab skins flush with the LE,
TE and stab tips.
❏ 14. Draw a centerline around the stab LE and tips to
help you maintain symmetry during sanding. Rough shape
the LE and the tips to the approximate cross-section
shown on the plan.
BUILD THE FIN
❏ 1. Make a left and right fin skin by cutting two 3/32" x
3" x 24" balsa sheets in half. Edge glue two sheets
together to make two 6" x 12" sheets.
❏ 2. Place the fin plan on a flat building board. Cover the
fin plan with plan protector or wax paper.
❏ 3. From a 1/2" x 7/8" x 24" balsa stick, cut a fin LE to
shape and pin it to the building board. From a 3/8" x 1/2" x
30" balsa stick, cut a fin TE and pin it to the building board.
❏ 4. From the 1/8" x 1/2" x 30" balsa sticks, cut and glue
fin ribs between the LE and TE.
❏ 5. From the remaining 1/2" x 1/2" balsa stick, cut and
glue 1" [25.4mm ) long hinge blocks to the trailing edge of
the fin at the locations shown on the stab plan.
❏ 6. Remove the fin from your building board. Inspect all
the glue joints and add CA to any joints that don’t appear
strong. Use a bar sander to sand the entire top and
bottom surface until it is flat and even. Be careful that you
don’t sand any area of the fin too thin.
❏ 7. Position the fin over the fin plan. Mark the location of
the top of formers F-8 and F-9 on both sides of the fin, .
❏ 8. Place one of the fin skins on your building board.
Apply an even bead of medium or thick CA to one side of
the fin framework. Place the framework on the fin skin,
aligning the end of the skin with the marks for the
formers. Press the skin down firmly until the glue has set.
❏ 9. Trim the fin skin flush with the LE, TE and the
balance tab opening at the top of the fin.
❏ 10. Glue the second fin skin to the framework aligning
the edge of the fin skin with the marks for the formers.
❏ 11. Trim the second skin flush with the framework. Draw
a centerline around the fin to help you maintain symmetry
during sanding. Sand a radius on the LE to the
approximate cross-section shown on the plan.