12
❑
27)
NOTE: The mounting of the electric motor in the KADET
SENIOR assumes that your motor has a typical "X" or "cross"
mounting plate on the back of the motor.
Also note that the firewall portion of the laser-cut plywood motor
mount is adjustable fore and aft to accommodate different length
motors. In this step we will adjust the motor mount for your par-
ticular electric motor. For the KADET SENIOR we need a total
distance from the back of the plywood motor mount box to the
motor’s thrust washer to end up exactly 4-1/4”. This distance al-
lows the cowling to fit properly.
a) Assemble your motor according to the manufacturer's in-
structions. Then carefully measure the distance from the back of
the mounting plate to the front of the thrust washer *.
*
The “thrust washer” is the part of the prop adaptor where the
back of the propeller will be located.
b) Subtract the measurement taken in the previous step a)
from 4-1/4”. The result is the distance you need to locate the front
of the firewall from the back of the plywood motor mount box.
(With the motor we are using in these photos, the motor meas-
urement is 2-3/4”. So 4-1/4” minus 2-3/4” = 1-1/2”. Your result
may be different depending on your motor.)
c) Carefully measure and mark the distance determined in the
previous step from the back edge of the motor mount box towards
the front. Do this along side each of the adjustment slots on both
sides of the box (four marks total).
d) After you have all four slots marked, carefully align the front
face of the firewall to line up with the marks. Make sure you end
up with the firewall straight and square in the box. If it is not,
recheck your marks and adjust as necessary.
e) Tack glue the firewall in place. Recheck once more to make
sure that the front of the firewall is at the correct distance from the
back of the motor mount box. That distance plus the length of
your motor must equal 4-1/4”. When satisfied it is correct, glue
the firewall securely to the rest of the motor mount box.
❑
28) Remove the X mount plate from the back of your motor and
center it on the firewall. Once you are sure it is properly located,
mark the mounting holes with a pencil. Set the X mount aside
❑
29) A long piece of balsa triangle stock provided to reinforce
the motor mount. Measure, cut and glue pieces of triangle stock
in all the corner joints inside the motor mount box.
❑
31) If you have not already re-attached the X mount plate to the
back of your motor, do so now. Then use (4) M4 x 16mm Socket-
Head Mounting Bolts and Lock Washers to bolt your motor in
place on the plywood motor mount box.
❑
32) Install your ESC
a) Solder appropriate battery connectors (not supplied) to the
battery leads of your ESC.
and drill out the
mounting holes with
a 7/32" dia. drill. In-
stall four M4 Blind
Nuts in the holes, on
the back side of the
firewall. Put a couple
drops of glue on the
flanges of the blind
nuts to secure them
to the plywood. Be
careful not to get any
of the glue in the
threads.
❑
30) Bolt the plywood
motor mount box to the
fuselage with M4 x
20mm
Socket-Head
Bolts and M4 Flat
Metal Washers. Note
that two access holes
have been provided in
the bottom corners of
the firewall to allow
easy access for your
hex wrench.