Also make sure you have plenty of exit area for the air to flow out
of the cowling. In any fully cowled installation (glow or electric), it
is critical that you have slightly more exit area than incoming area.
Having more exit area creates a positive air flow through the cowl-
ing - an actual suction effect - drawing the heated air out of the
cowling so that more cool air can come in.
Both glow engine and electric motor users resume assembly here.
Locate the following parts from the kit contents:
❑
(1) Stabilizer and Elevator assembly
❑
(1) Fin and Rudder assembly
Note that the elevator hinges are glued in at the factory. Flex the
elevators up and down a few times to free their movement. How-
ever, the rudder hinges are not glued. That will be done during
the assembly steps.
❑
1) Bolt the wing in place on the fuselage. Place the model on
a flat surface and orient it to allow you to view the airplane from
the front from a distance of 10 feet or so.
❑
2) Trial fit the stabilizer/elevator assembly on the fuselage, with-
out glue. Use a couple pins to hold it in position. Use a tape
measure or yardstick to measure the distance from the rear corner
of the stab straight ahead to the wing. Then, take the same meas-
urement on the other side of the fuselage. The two measurements
should be identical or within 1/8" of each other. If not, unpin the
stabilizer and shift it as needed to get the two measurements the
same. Once you have it squared up, use a fine felt time marker
to give yourself some guide marks at the front and back of the
stab, so you can quickly realign it later when glue is applied.
❑
3) Also check the alignment of the stabilizer from the front view.
With the stabilizer squarely in place and pinned, view the airplane
from the front and rear. The stabilizer should be equally aligned
with the wing - not tilting one way or the other. If it is tilting, correct
it. When satisfied with the alignment, remove the stabilizer from
the fuselage in preparation for gluing on permanently.
❑
4) We recommend gluing the stabilizer permanently onto the
fuselage with slow-drying epoxy glue, which will provide plenty of
time to get the stabilizer properly realigned with the fuselage and
wing. Mix a batch of epoxy in sufficient quantity to cover the area
of the fuselage where the stabilizer goes. Spread the glue evenly
over the exposed wood of the stabilizer saddle. Carefully set the
stabilizer back in position on the saddle. Press the stabilizer down
firmly and pin it in correct position. Quickly recheck the alignment
in both the top and front views before the glue dries. Use a paper
towel and rubbing alcohol to wipe off any excess glue that oozes
out of the joint. Let this joint dry completely before proceeding.
❑
5) Remove the rudder from the fin. The rudder will be hinged
later. Trial fit the fin on the fuselage, without glue. making sure
that the bottom of the fin sits flat and in full contact to the stabilizer.
Trim or sand the bottom of the fin tab until the fin sits fully in place
on top of the stabilizer.
❑
6) Hold the fin in place and use a sharp pencil to trace around
the front, where it extends forward of the stabilizer and on to the
top of the fuselage. Remove the fin and use a sharp hobby knife
to cut and remove the covering from just inside of the pencil
marks.
❑
7) Apply epoxy glue to the bottom of the fin, including the tab
that fits into the slot in the stabilizer. Press the fin in place into
the top of the stabilizer slot and wipe off any excess glue with al-
cohol. Use strips of tape and/or pins to hold the fin in correct po-
sition. Double check the alignment of the fin - it should be
perpendicular (90
O
) to the stabilizer. Adjust the tape as needed
to hold it in position. Use alcohol and a paper towel to wipe off
any excess glue. Allow the glue to dry completely.
❑
8) From the kit contents, locate the bag containing the tailwheel
assembly. Remove the metal 3-arm rudder steering horn and two
M2 x 10mm PWA screws used to mount the horn to the bottom of
the rudder, as shown. Position the front edge of the horn 1/8” be-
hind the leading edge of the rudder. Begin by using the rudder
steering horn as a template to first mark the locations for the
screw holes. Then use a 1/16” drill bit to make two pilot holes into
the bottom of the rudder. Secure the horn in place with the
screws.
❑
9) The rudder is now hinged to the vertical fin and fuselage.
a) Slide the three CA hinges in place into the slots in the rud-
der, centering them. Use pins in the center of each hinge to keep
them centered during the next step.
b) Now carefully slide the exposed half of the hinges into the
slots in the back of the fin and fuselage. Adjust the rudder position
and then remove the pins.
c) To set the proper amount of gap between the fin and rudder,
14
ATTACH THE TAIL SURFACES