Flex innovations Cessna 170 60E G2, Instruction Manual, Page: 19 / 28

18
CENTER OF GRAVITY
Setting the center of gravity (CG) is one of the most important steps
for successful flight, particularly with a new airplane. The Cessna 170
60E G2 is an extremely capable airplane with large control surface
throws and a high thrust to weight ratio. These factors make it an
enjoyable aircraft to fly, but if the CG is not within an acceptable
range, it will make the airplane di
ffi cult, if not impossible to control.
Prepare the aircraft to its flight-ready state. This means all hardware,
components and flight battery should be installed before
proceeding. The center of gravity (CG) is measured from the trailing
edge of the main wing toward the nose of the aircraft. Lift the
aircraft upright, with all components installed, from the bottom of
the wing at the CG location noted.
The acceptable CG range for the Cessna 170 60E G2 is 83mm to
97mm (3 1/4 inches to 3 3/4 inches). Designer and multi-time world
champion Quique Somenzini has found 90mm ( 3 1/2 inches) to be
the sweet spot in the acceptable CG range based on his extensive
test flights and experience.
NOTICE
The CG measurement should be made with the completed
airframe with all components (batteries, servos, receiver, linkages,
screws, bolts, hardware, etc.) installed. Failure to do so will result in
inaccurate measurement.
BATTERY INSTALLATION
1. Push the spring-loaded battery latch tab back to release the battery hatch. Lift the hatch away from the fuselage, starting at the front.
2. Remove the battery tray by loosening the thumb screw. Slide the tray forward as you gently lift the tray away from the fuselage.
3. Install an adhesive-backed hook strip to the battery tray, and an adhesive-backed loop strip to the battery.
4. Place the battery on the tray, and secure it in place with the hook and loop strap provided.
5. Re-install the tray into the battery compartment by aligning the rear tabs on the tray with the appropriate slots in the fuselage sub-frame.
Once seated in place, secure the tray to the sub-frame using the thumb screw.
6. Reinstall the hatch, and confirm that the latch has positively engaged.
WARNING
When making adjustments to linkages,
transmitter settings, or the Aura 8 flight
control system, remove the propeller to
guard against accidental spool up.
CAUTION
Always keep limbs clear from the propeller when the battery is connected. After the ESC
arms, the propeller will rotate when the throttle is moved. Unlike an internal combustion
engine, electric motors apply more voltage to counteract resistance, therefore any object
that is entangled in the propeller will be severely damaged before the motor will stop
90mm (+/- 7mm)
3-1/2- inches (+/- 1/4-inch)