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Hangar 9 F4U-1D Corsair 50 ARF
4. Use an 8-32 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
: Always use threadlock on metal-to-metal
fasteners to prevent them from vibrating loose.
5. Prepare the pre-assembled plywood motor mount box
by using a 3mm x 12mm and 3mm washer to draw the 3mm
blind nuts into the motor mount box as shown. Note that the
blind nuts are on the inside of the box, on the side with the
larger hole. The 2.5mm hex wrench and hardware for this
step are included with the motor.
6. Use four 6-32 x 3/4-inch socket head cap screws and
four #6 washers to attach the pre-assembled 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.
CAUTION
: Cut the top two 6-32 x 3/4-inch
socket head caps screws down in length so they do not
protrude through the firewall. In case you crash and the
battery moves forward it will not be punctured by the
bolt and cause a potential fire.
7. Use medium CA to glue the 3mm plywood battery tray
support tab to the underside of the radio tray. The curve in
the tab will match the lightning hole in the radio tray.
8. Place the hook and loop strap through the 3mm
plywood battery tray as shown. Note the position of the
tab at the front of the tray in relationship to the top view
of the tray.
Note
: Always use threadlock on metal-to-metal
fasteners to prevent them from vibrating loose.
9. Place the battery tray in the fuselage. The tab in the
front of the tray will key into the slot in the firewall. Use two
3mm x 12mm machine screws and two 3mm washers to
secure the tray. Use a #2 Phillips screwdriver to tighten the
screws.
