To achieve the correct position of the throttle/servo arm, it may be necessary to reposition the throttle arm on the carburetor. It may
also be necessary to adjust the length of the throttle linkage slightly to achieve full open and closed positions of the carburetor.
It is also possible to increase/reduce the travel of the throttle servo through the travel adjust function found in most computer radio
systems. If this function is used, make sure the values for the high and low positions remain equal (same value for high/low). If these
values are not equal, this will create a differential or uneven movement of the throttle, making rotor rpm adjustment and fine-tuning
more difficult.
39
7-8
THROTTLE LINKAGE INSTALLATION (ALL)
.............. 1 pc
2 x 8 mm Flat Head Screw
.................. 1 pc
Steel Joint Ball
...................... 1 pc
2 mm Hex Nut
Note: Make sure that the throttle trim is in the low
position before attaching the servo horn.
2 x 8 mm Flat Head Screw
Steel Joint Ball
2 mm Hex Nut
Servo Horn
Use Threadlock
Low
Throttle
High
Throttle
Servo Reversing Directions
JR Norm
Futaba
Norm
Use blue Threadlock
SERVO HORN SELECTION/LINKAGE ADJUSTMENTS
JR System/Webra .35 Engine or MDS .38 Heli Engine
JR System/O.S. .32SX-H Engine
Futaba System/Webra .35 Engine or MDS 38 Heli Engine
Futaba System/O.S. .32SX-H Engine
Be sure to remove the excess servo horn arms as shown. Secure the servo horn using the servo horn screw.
12.5 mm
60 mm
59 mm
Use this hole
57 mm
58 mm
Use this hole
12.5 mm
2.3 x 75 mm
2.3 x 75 mm
THROTTLE ARM/SERVO HORN POSITIONS
*To avoid differential throttle travel, make certain both the throttle arm and the servo horn are positioned as shown in the above diagrams.
1/2 Stick (Throttle) Position
(Throttle Barrel 1/2 open)
Low Stick (Throttle) Position
(Throttle Barrel Fully Closed)
High Stick (Throttle) Position
(Throttle Barrel Fully Open)
90°
90°
90°
JRP9012.46 Robinson R22 Manual 10/6/00 5:06 PM Page 39
