Hangar 9 P-40B Warhawk 50 ARF Assembly Manual page 29

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3. Use low-tack tape to secure the engine mounting
template for the Power 52 installation to the fuselage. Use
the center hole in the firewall and template for alignment.
Use a drill and 1/16-inch (1.5mm) drill bit to drill the pilot
holes for the engine mount into the firewall. Remove the
template and use a 3/16-inch drill bit to enlarge the holes.
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4. Use a 6-32 x 3/4-inch socket head cap screw and #6
washer to draw the four 6-32 blind nuts into the firewall
from the inside of the fuselage. Use a 7/64-inch hex wrench
to tighten the bolts. Remove the bolt once all the blind nuts
are installed. Note that two blind nuts have been trimmed to
clear the notch in the rear of the firewall for the radio tray.
Hangar 9 P-40B Warhawk 50 ARF

5. Use four 6-32 x 3/4-inch socket head cap screws and
four #6 washers to attach the preassembled plywood motor
mount box to the firewall. Make sure the smaller hole in the
motor mount box aligns with the hole in the firewall, and that
the center lines on the box align with those on the firewall.
Make sure to use threadlock on the screws to prevent them
from vibrating loose.
CAUTION: Cut the bottom two 6-32 x 3/4-inch
socket head caps screws down in length so they do not
protrude through the firewall. Failure to do so could
cause the battery to be punctured by the bolt, in the
event of a crash and the battery moving forward.

6. The motor shaft must be reversed prior to installing
the X-mount and propeller adapter. Refer to the instructions
provided with the motor to do this. Once the shaft has been
repositioned, attach the propeller adapter on the motor using
the hardware provided with the adapter.
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