firewall side. When you can see the end of the dowel in
the fuselage, slip one of the blind nuts onto it, and then
pull the dowel back out of the hole while holding the nut
on the dowel from the inside. This will locate the blind
nut to the backside of the hole every time.
Once you have the blind nut started in the hole, hold it in
position from the inside with one hand while you remove
the dowel and start one of the M4 bolts into the blind nut
with the other hand (or enlist a helper). Tighten the bolt
to pull the blind nut into final position. Be sure to use a
flat washer under the bolt head to prevent the bolt from
sinking into the face of the firewall.
If desired, the blind mounting nuts can be permanently
adhered to the backside of the firewall by using a little
5-minute epoxy on your finger to spread the glue around
the outside edges of each blind nut. Do not get glue in
the threads of the blind nut.
c) Place the X mount, that came with your brushless motor,
on the front of the plywood motor mount. Center it using
the etched lines on the front as your guide. Mark the
locations of the four mounting holes.
d) Drill out the four holes for the X mount, first using a 1/16"
dia. drill bit as a pilot, followed by a 1/4" bit. Then install
an M4 blind nut in each of the four holes, on the back
side of the firewall.
e) A long piece of balsa triangle stock is provided to
reinforce the motor mount. Measure, cut and glue
pieces of triangle stock in all the corner joints inside the
motor mount box. Make sure to soak in plenty of CA to
make a strong joint.
f) Mount the plywood motor mount onto the fuselage with
four M4 x 25 bolts and M4 flat washers. You can access
the head of the bolts through the slots in the side of the
mount using a ball-end hex wrench or driver, as shown.
❑
39) A set of four M4 x 20mm socket-head bolts and M4 lock
washers are provided to mount your motor to the motor mount.
Check to make sure your motor wires are not coming out the top
of the mount when the motor is secured or they will interfere
with the cowl. We found it best to route the wires out the
bottom of the mount. Use blue thread locker on the bolts to
ensure they do not come loose.
❑
40) Connect the three motor wires of your Electronic Speed
Control (ESC) to the motor. Mount the ESC to the bottom or
sides of the plywood electric motor mount. Plastic cinch straps
are very handy for this, and for securing loose wires to
structure. Also route the ESC's servo wire back to your
receiver and plug it in.
❑
41) A laser-cut plywood removable battery tray is included
for mounting the batteries in the airplane. Use two Velcro
®
straps to secure your batteries to the tray and then install it into
the airplane. The tab at the front of the tray locks into a slot at
the front of the fuselage, and the rear end of the tray is held in
place with a M4 x 20mm nylon bolt. The tray with batteries will
fit into the airplane through the side windows. Optional: In
addition to the two straps, it is a good idea to use hook-&-loop
tape (not furnished) on the bottom of your battery pack and on
the top surface of the plywood battery tray, to make sure the
battery pack will not move around during aerobatics.
19