Hangar 9 F6F-5 Hellcat 15cc Manuel D'utilisation page 25

138. Position the X-mount on the front of the motor box, aligning
it with the centerlines. Use a clamp to hold the mount while
marking the mounting holes on the motor box with a felt-
tipped pen.
139. Remove the mount from the motor box. Use a drill and 9/64-
inch (3.5mm) drill bit to drill the holes to attach the X-mount
to the motor box.
 The supplied template is marked for multiple motor
options. Make sure to use the marks that suits the chosen
power option. Other power options than those shown on
the template can also be used on the Hellcat. We suggest
using the template as a dummy firewall to ensure the power
option chosen fits, and help align the holes for mounting.
140. Place the mounting template on the fi rewall. Use low-tack
tape to hold the template in position. Use a drill and 5/32-inch
(2mm) drill bit to drill the four holes in the fi rewall to attach
the motor box.
141. Remove the template from the fuselage. Use a drill and 7/32-
inch (5.5mm) drill bit to enlarge the holes from the previous
step.
F6F-5 Hellcat 15cc
142. Use an M4 x 20 socket head cap screw and M4 washer to
pull the M4 blind nuts into the back of the fi rewall.
 Use a large washer between the screw and firewall
to prevent compressing the wood on the firewall.
143. The prongs of the blind nuts will secure them in the back of
the fi rewall. Install all four M4 blind nuts at the time. Once
installed, remove the screws from the blind nuts.
144. Attach the motor box to the fi rewall using the four M4 x 20
socket head cap screws and M4 washers. Place a drop of
threadlock on each screw before their installation, then use a
3mm hex wrench to tighten each screw.
145. Use a #2 Phillips screwdriver to attach the X-mount to the
rear of the motor. Apply a drop of threadlock on the screws
before securing the X-mount to the motor.
146. Attach the motor to the motor box using four M3 x 15 socket
head cap screws, four M3 washers and four M3 blind nuts.
Place a drop of threadlock on each screw before their
installation. Tighten each screw using a 2.5mm hex wrench.
25 EN