Dynaflite PT-19 - Manual (Page 25)

7. To drill the mounting holes in the cowl use the
cardboard technique again. Tape some cardboard
to the fuselage side and mark the center of the
mounting blocks. Slip the cowl into position and
mark the location of the holes. Drill 3/32" holes
through the cowl and blocks, then remove the cowl
and enlarge the holes in only the cowl to 1/8".
Mount the cowl with #6 x 1 /2" sheet metal screws.
18. Hinge the control surfaces. The kit includes a
hinge strip from which you can cut CA hinges, or
you can use other hinges of your choice. The
following general guidelines will discuss hinging. We
will discuss hinging the elevator but the same
process is used to hinge the rudder and ailerons.
A. If you have not already done so, mark the
centerline of the TE of the stab.
B. The LE of the elevators has already been
sanded to a "V," so this will be used as
the centerline.
C. Using the plan as a reference, mark the
locations of the hinges to be installed.
CUT HINGE SLOT
WITH HOBBY KNIFE
AND No. 11 BLADE
D. Use a hobby knife with a #11 blade to make
the hinge slots. The first cut should be a
shallow slit to establish the hinge slot location.
After the first cut, make several more cuts
going slightly deeper each time. Move the
knife from side to side and widen the slot as
you cut.
E. Test join the elevators to the stab with the
hinges in place. DO NOT glue until later.
F. Perform the same process for the rudder and for
the ailerons.
AFTER you have completely covered and finished
your model, perform the following:
A. Use your hobby knife and a sharp #11 blade
to remove a small strip of covering from the
hinge slots to expose them.
THE CA WICKS
ALONG THE "TUNNELS"
TO THE ENTIRE
HINGE SURFACE
B. Drill a 3/32" hole in the center of all the hinge
slots to allow the CA to fully penetrate. This is
best done with a high-speed tool such as a
powered hand tool. If you use a drill, remove
slivers of balsa wood from the hinge slots with
a hobby knife after you drill the holes.
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