Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5
5
Setting up the StabPLUS
Installation
These instructions are intended to explain the basic steps in setting up the Lemon Stabilizer PLUS for a
conventional model (no elevons or V-tail). The following channel assignments are used:
CH1 - Throttle
CH2 - Ailerons (or Right Aileron if dual servos on separate channels are used)
CH3 - Elevator
CH4 - Rudder
CH5 (Gear) - Dedicated to selection of Stabilizer Mode, generally not usable for any other purpose
(unless Always-ON is used, see page 13)
CH6 (Aux1) - Left Aileron (only if dual servos on separate channels are used), or other function
CH7 (Aux2) - Available for other function (also used for Bind)
CH8 (Aux3) - Dedicated to Master Gain, not usable for any other purpose
For details on other configurations, see the Reference Guide. Note that if Elevon (Delta) or V-tail mixing is
required, it MUST be done in the Stabilizer, not in the transmitter. See also page 16.
Basic Setup
Start by creating a new model in the transmitter or do a reset on the chosen model memory. For a recent
Spektrum transmitter, if the model has a single aileron servo or dual aileron servos on a Y-cable, choose
Normal Wing Type in the Aircraft Type menu. This menu is called Wing Type in some older transmitters.
Set stabilizer switches J4 and J5 to ON. Use a pin to change switch settings, making sure the switch snaps
over completely.
For a model with two aileron servos on separate channels, select Dual Aileron Wing Type. In this case, also
set switch J6 ON to activate aileron stabilization on channel 6 (Aux1).
For a DX6i, select WingTailMix, Dual
Aileron.
To control Stabilization Mode, Channel 5 (Gear) should be assigned to a three-position switch if possible.
On recent Spektrum programmable transmitters, go to Channel Assign, Channel Input Config and select a
three-position switch (such as B or D). For a DX6i, see Annex D (page 18).
If your transmitter has eight or more channels, set up a knob or slider for channel 8 (Aux3) to control
Master Gain. On recent Spektrum transmitters, this is done in Channel Assign by setting Aux3 to be
controlled by a knob (RKnb). The direction of increasing gain can be changed by reversing the channel (look
at the Monitor screen to determine which way is increasing). Note that channel 8, if available, cannot be
used for any function other than Master Gain.
Installation
The most common installation has the Stabilizer PLUS upright in the aircraft (i.e., flat on a surface that is
horizontal when the model is in normal level flight attitude). The long axis of the unit must be aligned with
Note that channel 7 (Aux2) is also used for binding the receiver. There may be a problem if this channel is used to
operate certain types of retractable landing gear. If this is the case, use another channel for retracts. See Annex F.
Flaperon Wing Type should only be used if you take precautions to prevent the use of the flaperon mix in Autolevel
mode. Likewise, Aileron Differential must not be used in Autolevel mode. See page 14.
See Annex D for discussion of using a two position switch.
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