Dynaflite PT-19 - Manual (Page 19)

LI 18. Cut the tip shape from the plan and position
it over the stabilizer. Use the 15" marks, LE and TE
as a guide. Cut the stab and elevator tips to shape.
1 19. Sand the assembly to its final shape.
20. Separate the elevators from the stab. Sand
the trailing edge of the stabilizer flat. Do not sand it
to the "V" shape shown on the plan.
21. Mark the centerline of the elevator leading
edges along their entire length. Using the cross
section on the plans as a reference, sand the leading
edges to the "V" shape shown. Make sure the "V" is
enough to allow for the full up and down movement
of the elevators.
3. Cut the fin post (trailing edge) from
3/8" x 15/16" x 30" balsa and pin it in position.
4. Cut the fin base from the 3/8" x 15/16" x 30"
balsa and pin it into position. Glue all three
pieces together.
5. Cut and fit the ribs from 3/16" x 3/8" x 24"
balsa. Cut the longer ribs first. When satisfied with
the fit, glue them into position.
NOTE: It is important that the ribs fit the LE and TE
well. It is not important that each rib fit the exact
location shown on the plan.
6. Remove the fin from the plan and rough sand
it to the shape shown in the cross section.
7. Sheet the fin with 1/16" x 3" x 30" balsa on
both sides. Do this with the fin flat on your building
board and use care not to twist it as you glue the
sheeting into place.
1. Cover the fin/rudder drawing with wax paper.
2. Cut the fin leading edge from 3/8" x 15/16" x 30"
balsa and pin it in place over the plan.
8. Cut the rudder leading edge from
1/2" x 15/16" x 36" balsa and pin it to the plans.
9. Cut the balance tab to shape from leftover
1/2" x 15/16" balsa. Glue and pin it into position.
1 10. Laminate the four die-cut rudder base pieces
together with medium CA. Sand the edges flat and
glue it into position.
LI 11. The trailing edge is built up from four 3/32"
die-cut pieces to create one 3/16" thick piece.
Laminate the parts together using the plan as
a reference.
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