O.S. Engines FS-91 II FI - Manual (Page 14)

14
Ensuring a proper linkage is important in the FS-91S FI system in terms of a proper air-fuel
mixture. In other words, it is necessary to maintain the proper relationship between opening of the
air valve (stick position) and fuel injection by the injector.
LINKAGE AND INITIAL SETTINGS
Call up the ATV menu on the
condition menu and select THR.
Confirm that it is in the center of the
throttle curve when the stick is in the
center position. The nalign the mark
in the center of the air valve at that
point. The center of the curve is the
center, and if the stick is shifted out
of position, give priority to the center
of the throttle curve.
Throttle opening
Throttle stick position
Rotor Slow Mark
Make the settings according to the procedures described below.
Adjust the throttle trim on the transmitter to 0.
Set the angle adjustment of all throttle channels (ATV AFR) to 100% and sub trim to 0.
Set mixing of the throttle curve, expo channel and so forth to off (0), and set the throttle trim in
the center.
Align the throttle stick on the transmitter at the center position as shown in the figure.
Accurately align the throttle servo and air valve sections as shown in the figure.
(1) Transmitter Trim Adjustment
(2) Confirmation of Amount of Throttle Angle
(3) Throttle Servo and Air Valve Linkage Method
Vertical position of air valve horn: Rotor mark is at the position of the
center mark on the body (90˚ relative to the throttle linkage rod)
Throttle servo: Center position
Right angle
Transmitter
Center
Stick position: Set to the center position.
Fig.8
(with Futaba PCM 1024ZA T9Z transmitter)
Rotor Center
Mark
Rotor Full
Open Mark
Basic Mark on Air Valve Body
Basic Mark on Air Valve Body
Rotor Center
Mark