User Manual

20
140mm Recommended
(5 5/16 in. - 5 23/32 in.)
135mm - 145mm
(5 1/2 in. Recommended)
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 QQ Yak 55
10E Super PNP 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 difficult, 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 QQ Yak 55 10E Super PNP is 145mm
to 135mm (5 23/32 inches to 5 5/16 inches) measured Forward,
from the Trailing Edge of the wing, at the Wing Tip. A good
starting point is 140mm and you can adjust from there according to
your flying style.
Designer and multi-time world champion Quique Somenzini has
found 140mm 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. Install the hook side of adhesive-backed hook and loop tape to the plywood battery tray in the fuselage, and the loop side to your battery.
3. Place the battery on the tray, and secure it in place with the hook and loop strap provided.
4. 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