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FUSELAGE SUBASSEMBLIES
Before starting fuselage construction there are a few subassemblies that should be built and set aside until needed. This is
done to avoid interruptions during the flow of the fuselage construction.
NOTE: You need to have the engine that you will be using on hand when working on the firewall. We don’t recommend
using the motor mounts provided in this kit for any two cycle engine larger than .65 or for any four cycle engine larger
than .80.
1
a.
Using the laser marks draw the vertical and horizontal centerlines that will locate the engine. Use the F-1 cross section
drawing on the plan as a guide. Check the width of your engine and determine the spacing needed between the motor
mounts. Using the lines on the firewall, locate the mounts, mark the location of the four holes on the firewall and drill the
four holes with a 3/16" drill.
b.
Bolt the engine mounts loosely to the firewall with four 6-32 bolts and blind mounting nuts. Double check the location and
spacing of the mounts. Now tighten the bolts until the prongs of the blind nuts are started into the wood and holding.
Remove the motor mounts from the firewall and seat the blind nuts with a hammer. Spread epoxy glue over the blind nuts to
hold them in place. Be careful not to get any glue in the threads of the blind nuts. When dry, bolt the nuts to the firewall.
c.
Glue balsa former F1A on the back of the firewall (same side as the blind nuts).
d.
Using the side view of the plans as a guide position the engine on the mounts so the propeller will clear the fuselage
"cheeks" by 1/8" to a 1/4" and mark the engine mounting holes. Keep the as far back on the motor mounts as possible.
Remove the mounts from the firewall and drill the holes for the engine mounting bolts. Bolt the engine to the motor mounts,
the motor mounts to the firewall and mark the location for the throttle pushrod to pass through the firewall. Allow clearance
for the throttle pushrod connector included in the hardware package. Drill an 9/64" hole at this mark for the outer housing of
the flexible cable.
2.
Glue balsa former F-5A to lite-ply former F-5.
3.
A laser cut piece of plywood 1/4"x1-5/8"x3-7/8” is used for the landing gear plate.
Bolt the landing gear loosely to landing gear plate with three 6-32 x1/2" bolts and
blind mounting nuts. Now tighten the bolts until the prongs of the blind nuts are
started into the wood and holding. Remove the landing gear LGM and seat the
blind nuts with a hammer. Spread epoxy glue over the blind nuts to hold them in
place. Be careful not to get any glue in the threads of the blind nuts.
4.
Glue former F-3 to former F3B, making sure the bottom edge lines up. When dry,
clean up the two 1/4" holes from F3 through F3B.
5
a.
Glue the fuselage doublers to the
fuselage sides with slow CA or epoxy.
MAKE ONE LEFT AND ONE RIGHT.
Keep the sides flat with pins or weights
until the glue has cured.
b.
Mark and sand a bevel on the bottom of
the firewall to match the angle of the
bottom of the fuselage. Make sure the
angle is facing the correct direction.
