www.valuehobby.com/j3-90.html
Step4. Use four M2.3x8mm self-tapping screws to
secure the cowling to the fuselage.
Step5. Install the prop and spinner to the motor.
Section 13: Setting CG and Control
Throws
Recommended CG
For the first flights, the recommended Center of
Gravity location is 120mm behind the leading edge
of the wing against the fuselage. Use the battery
pack, moving it forward or backward, to achieve the
correct balance
Low / Precision Rates (in degrees) and
Corresponding Exponential
Elevator
Low Rate
: 11/16" (11.5º) Up 9/16" (10º) Down
High Rate
: 1/4" (19.5º) Up 1" (18º) Down
Linear measurement (Inches) measured at widest part
of elevator (roughly in the center).
Aileron
Low Rate
: 3/8" (8º) Up 1/2" (9º) Down
High Rate
: 7/8" (21º) Up 11/16" (22º) Down
Linear measurement (inches) measured at root.
Rudder
11/2" (28º) Left 11/2" (28º) Right
Linear measurement (inches) measured at front of
counterbalance.
Note
:
Use the Low Rate for most flying. The High
Rate is used specifically for performing spin
maneuvers Note: that Futaba and Hitec radios
require NEGATIVE exponential, while JR and
Spektrum use POSITIVE exponential.
Range test your radio
Step1
. Before fly, be sure to range check your radio
as manufacturer’s instruction manual of your
radio‐system recommends.
Step2
. Double‐check all controls (aileron, elevator,
rudder and throttle) move in the correct direction.
step3. Be sure that your LiPO battery is fully
charged.
