User Manual
EN
Opterra
®
2m
Low Voltage Cutoff (LVC)
When a Li-Po battery is discharged below 3V per cell, it will not hold a charge.
The ESC protects the ight battery from over-discharge using Low Voltage Cut-
off (LVC). Before the battery charge decreases too much, LVC removes power
supplied to the motor. Power to the motor pulses, showing that some battery
power is reserved for ight control and safe landing.
Disconnect and remove the Li-Po battery from the aircraft after use to prevent
trickle discharge. Charge your Li-Po battery to about half capacity before stor-
age. During storage, make sure the battery charge does not fall below 3V per
cell. LVC does not prevent the battery from over-discharge during storage.
NOTICE: Repeated ying to LVC will damage the battery.
Tip: Monitor your aircraft battery’s voltage before and after ying by using a
Li-Po Cell Voltage Checker (SPMXBC100, sold separately).
Control Horn and Servo Arm Settings
The table to the right shows the factory settings for the control horns and servo
arms. Fly the aircraft at factory settings before making changes.
NOTICE: If control throws are changed from the factory settings, the AR631
gain values may need to be adjusted. Refer to the Spektrum AR631 manual for
adjustment of gain values.
After ying, you may choose to adjust the linkage positions for the desired
control response. See the table to the right.
Horns Arms
Elevons
Control Surface Centering
After assembly and transmitter setup, conrm that the control surfaces are
centered. Make sure that the trailing edge is 1 mm up from the center; this
is the center location for this aircraft. If the control surfaces are not centered,
mechanically center the control surfaces by adjusting the linkages.
If adjustment is required, turn the clevis on the linkage to change the length of
the linkage between the servo arm and the control horn.
After binding a transmitter to the aircraft receiver, set the trims and
sub-trims to 0, then adjust the clevises to center the control surfaces.
PNP Receiver Selection and Installation
The Spektrum™ AR631 receiver is recommended for this airplane. If you
choose to install another receiver, ensure that it is at least a 6-channel full
range receiver. Refer to your receiver manual for correct installation and opera-
tion instructions.
Installation (AR631 shown)
1. Remove the canopy from the fuselage.
2. Mount the receiver using double-sided servo tape. The receiver may be
mounted upright, upside down or on its side, but it should be square with
the fuselage in its mounting position. The receiver cannot be mounted at
an odd angle.
TIP: For SAFE setups, install the receiver as close to the center of gravity
of the aircraft as practical.
3. Connect the servos to their respective ports on the receiver using the
chart below.
CAUTION: Incorrect installation of the receiver could cause a crash.
Always perform a control surface check and AS3X control surface
response test before ying a new setup, or after any setup changes.
IMPORTANT: When using Y-harness or servo extensions with Spektrum equip-
ment, do not use reversing harnesses. Using reversing Y-harnesses or servo
extensions may cause servos to operate erratically or not function at all.
AR630 Port Assignments
Bind/Prog/SRXL2= Bind, Aux Device Support, Program
1 Throttle (Smart Throttle)
2 Aileron
3 Elevator
4 NA
5 NA
6 NA
8