GREAT PLANES turmoil arf, Instruction Manual, Page: 16 / 24

If mounting the included stick-mounted motor and gearbox
or an after-market geared brushless system, follow the
instructions in this section. If mounting a firewall-mounted
motor system, proceed to
“Firewall-Mounted Motor
System” on page 17.
❏
1. The 10 x 10 x 27mm [25/64" x 25/64" x 1-1/16"] hardwood
motor mount block must be mounted in the correct
orientation. Identify the top, aft end of the block as shown in the
sketch so you will know how it is to be installed.
❏
2. Without using any glue, slide the motor mount block
over the fuselage tube. Be certain the block is in the correct
position so there will be down and right thrust. Do not glue
the motor mount block onto the fuselage tube.
❏
3. If using the included propeller, install the prop saver
onto the gearbox shaft with the large-diameter cone
forward. If using a GWS prop, install the prop saver with the
small-diameter cone forward. Tighten the screws, making
sure they engage the flat spots on the shaft.
❏
5. Drill a 1.5mm [1/16"] pilot hole at an angle from the top
of the gearbox through the balsa block and carbon tubes.
Make sure the motor mount block does not rotate while
drilling. Secure the gearbox and block with a 2 x 8mm
[5/64" x 5/16"] wood screw.
❏
6. If using an APC prop, insert the larger of the two
adapter rings (included in the propeller packaging) into the
rear of the propeller hub.
❏
7. Secure the prop to the prop saver with one of the
included O-rings.
❏
8. Connect your speed control to the motor and receiver.
Mount the speed control to the bottom of the right horizontal
fuselage with double-sided foam tape. Cut a small hole for the
ESC’s battery wire to cross to the right side of the fuselage.
Mount the Motor & Gearbox
16
GPM
APC
GWS