Horizon Hobby HobbyZone Apprentice STOL S - Aircraft Trimming and Control Surfaces; Trimming for Stable Flight; Control Surface Centering

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Low Voltage Cutoff (LVC)
Low Voltage Cutoff is a function built into the electronic speed control to
protect the battery from over-discharge. When the ight battery charge is low,
LVC limits power supplied to the motor so the ight controls receive sufcient
energy to safely land the aircraft.
When LVC engages, the aircraft will slow and the motor will begin to pulse.
When the motor power decreases, land the aircraft immediately and charge the
ight battery.
NOTICE: Repeated ying to the low voltage cutoff will damage the battery.
Aircraft Drift Required Trim
Elevator
Elevator Trim
Elevator Trim
Aileron
Aileron Trim
Aileron Trim
Rudder
Rudder Trim
Rudder Trim
Trimming the Aircraft
Before the rst ights, or in the event of an accident, make sure the ight
control surfaces are centered. Adjust the linkages mechanically if the control
surfaces are not centered, avoid excessive use of transmitter sub-trims. Control
surface centering must be done with SAFE off, and AS3X not active. Keep the
throttle at zero after powering on to prevent AS3X from activating.
IMPORTANT: Enable throttle cut to help prevent accidental throttle activation.
1. Verify the trims and subtrims on your transmitter are neutral.
2. Connect a battery to the model with SAFE off and keep throttle at zero.
3. When needed, use a pair of pliers to carefully bend the metal linkage (see
illustration).
4. Make the U-shape narrower to make the linkage shorter. Make the U-shape
wider to make the linkage longer.
Centering Controls After First Flights
For best performance with AS3X, it is important that excessive trim is
not used. If the aircraft requires excessive transmitter trim (4 or more clicks
of trim per channel), return the transmitter trim to zero and adjust the linkages
mechanically so that the control surfaces are in the ight trimmed position.
Control Surface Centering
Adjusting Trim in Flight
If your aircraft does not y straight and level at half throttle with the sticks at
neutral, y into the wind and adjust the trim sliders as indicated in the table
until the aircraft maintains a reasonably straight and level ight path.
• Trimming is best done in calm wind conditions.
• The SAFE ight mode switch should be set to Experienced mode (switch B,
position2) before adjusting the trims.
After the aircraft is trimmed in ight, land the aircraft and proceed to the
Manually Adjusting Trim section to re-center the servos and set the trim
mechanically.
The included SLT6LP transmitter features electronic trim buttons. The
transmitter emits a faint beep with each click of the trim buttons in either
direction. Holding the button in either direction quickly adjusts the trim several
steps until the button is released or until the trim reaches the end of its travel.
If the trim button does not beep when clicked, the trim is at the far end of its
travel. Center trim is indicated by a slightly louder beep.
TIP: Trim the aircraft at sufcient altitude of about 100' (30 meters). Having
an experienced ight instructor trim your aircraft during the rst ight is
recommended.