Electric Motor Installation - Horizon Hobby Pitts S-2B 50–60cc Manuel D'utilisation

109. Secure the interplane strut mounting pins using the clips
provided.
110. Once all the pins have been secured, tighten the M4 x 10
button head screws using a 2.5mm hex wrench. Remember
to apply a drop of thread lock on each screw to prevent it
from vibrating loose.

ELECTRIC MOTOR INSTALLATION

 If installing a gas engine, please skip to
the next section of the manual
111. Use the lines around the holes in the fi rewall and template to
properly align the template. Use low-tack tape to secure the
motor mounting template on the fi rewall.
112. Use a drill and 1/4-inch (6.5mm) drill bit to drill the holes
in the fi rewall for the motor mounting screws. Remove the
template and tape from the fi rewall.
113. Mix 3/4 ounce (20cc) of 30-minute epoxy. Apply the epoxy to
the face of three of the plywood EP mounts.
 The EP firewall is four pieces of plywood
that are laminated together.
Pitts S-2B 50–60cc
114. Layer the mounts and use low-tack tape to hold them
together until the epoxy fully cures. Make sure all the holes
are aligned.
115. Remove the forward compartment cover from the fuselage
using a #2 Phillips screwdriver. Set the screws and cover
aside.
116. Use an M5 x 60 socket head cap screw, an M5 washer and
an aluminum standoff to draw the M5 blind nut into the back
of the fi rewall. Tighten the screw using an M4 hex wrench.
Install all four blind nuts. Secure the blind nuts to the inside of
the fi rewall using a small amount of 30-minute epoxy. Make
sure no epoxy enters the threads of the blind nuts.
117. Remove the tape once the epoxy cures on the EP mounts.
Attach the mount to the fi rewall using four aluminum
standoffs, M5 x 60 socket head cap screws and four M5
washers. Use thread lock on the screws to prevent them from
vibrating loose. Tighten the screws using an M4 hex wrench.
17 EN