Flex Cessna 170 - Battery Installation; Center of Gravity

BATTERY INSTALLATION
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It is recommended to install adhesive-backed hook and loop tape strips to the baery and baery tray to help prevent the baery from coming
loose in ight.
Pull the spring-loaded baery latch tab towards the nose of the airplane to release the baery hatch. Be sure to connue holding the latch.
Using the tape on the front of the hatch, li the hatch up, and towards the nose to remove it from the fuselage. Release the latch once the
hatch is o of the fuselage.
Press the baery to the center of the baery tray and secure with the provided hook and loop straps. Depending on your baery selecon,
locaon may vary. Consult the center of gravity secon at the boom of this page in order to set the baery locaon for the proper center of
gravity.
Reinstall the hatch in reverse order, and conrm that the latch has posively engaged.
WARNING
When making adjustments to linkages, transmier
sengs, or the Aura 8 ight control system, remove
the propeller to guard against accidental spool up.
CAUTION
Always keep limbs clear from the propeller when the
baery is connected. Aer the ESC arms, the propeller
will rotate when the throle is moved. Unlike an
internal combuson 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.
CENTER OF GRAVITY
The locaon of the center of gravity (CG) for the Cessna
170 is 90mm (3-1/2-inches) AFT of the leading edge of
the wing at the wing root, plus or minus 7mm (1/4-inch).
This measurement was determined from many test
ights by designer and many me world aerobac
champion, Quique Somenzini. Li the airplane from the
underside of the wing to check the CG. Be sure to keep
the model level while measuring CG (model should be in
its ying posion, where the boom of the airfoil is
level).
Seng the center of gravity is one of the most important
steps for success, parcularly with a new airplane. The
Cessna is a versale airplane, with many dierent baery
opons, large throws, and a high thrust to weight rao.
These factors make it a very enjoyable aircra to y, but
if the center of gravity is not within an acceptable range,
it will make the airplane dicult, if not impossible, to
control.
NOTICE
The CG measurement should be made with the
completed airframe, with all components (baeries,
servos, receiver, linkages, screws, bolts, hardware,
etc.) installed. Failure to do so will result in
inaccurate measurement.
90mm (+/- 7mm)
3-1/2- inches (+/- 1/4-inch)