Dynaflite PT-19 - Manual (Page 23)

2. Cut the stab mounts from 1/4" x 3/4" x 30
balsa and glue them securely to the fuselage.
1—1 3. Use leftover 1/8" sheeting to sheet below the
stab to the stringer with the grain running vertically.
This is for the pushrod exit.
4. Before mounting the stab to the fuselage, you
should first carve the fin fairing blocks. The photo
shows some shim blocks that have been tack glued
into position. The lower shims are from leftover 5/8"
sticks used on the elevator LE. The top shim is from
1/2" wide wood from the stab. These shim blocks
are to properly space the fairing blocks.
5. Cut two 10" pieces from a 3/8" x 3/4" x 24"
balsa stick. These are the fairing blocks. Tack glue
them into position on the shims and carve the
assembly to shape. When you are satisfied with your
work, remove the fairing blocks and shims from the
fuselage. Clean up the stab mounting area.
6. Next, you will mount the stab to the fuselage,
but before doing so you need to look more closely at
it. As this is a large model, you should not depend
on glue alone to hold the stab in place. The plan
shows a 1/8" ply tongue that has been inset into the
stab and is used to key the LE of the stab into former
G in the fuselage. The photo shows two 1/8" dowels
that are used for the same purpose. Either method
works well but the dowels are probably easier to
install. In addition, the rear of the stab has a piece of
1/8" x 1/2" x 2-1/2" ply that is inset into the TE
and extends down into the fuselage.
7. Bolt the wing to the fuselage. Fit the stab into
position and adjust the stab mount as needed to
make the stab level with the wing. Be careful not to
change the incidence angle of the stab. Put a pin in
the nose of the fuselage on the centerline. Use your
string to align the stab just as you did for the wing.
When satisfied with the alignment, glue the stab in
position with 30-minute epoxy.
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