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120/140 3-SERVO CCPM SWASHPLATE MIXING
The JR
®
120°/140° CCPM or Cyclic/Collective Pitch Mixing system offers the user a control system that can accomplish the
same control inputs as a one servo standard system, but with increased precision and reduced complexity.
As with the one servo system, the JR CCPM system utilizes three servos for the three main controls: aileron (roll),
elevator(pitch), and collective. The CCPM lower swashplate ring is designed with only three control balls, spaced at 120° or
140° from each other, hence the 120°/140° CCPM designation. Although the control balls are not at 90° as in the standard
system, the aileron (roll) axis is still parallel to the main mechanics of the helicopter, and the elevator (pitch) axis still functions
at 90° to the mechanics as does the one servo system. Please refer to the diagram below for clarification.
The main difference in the way that these two systems operate is that unlike the one servo system where the three servos
work completely independent from each other, the CCPM systems work as a team to achieve the same control inputs. For
example, if an aileron (roll) input is given, two servos work together to move the swashplate left and right. If an elevator (pitch)
input is given, all three servos work together to move the swashplate fore and aft. For collective, it’s also the strength of three
servos that will move the swashplate up and down the main rotor shaft. With two or three servos working at the same time
during any given control input, servo torque is maximized and servo centering is also increased. In addition to these benefits,
CCPM achieves these control responses without the need for complex mechanical mixing systems that require many more
control rods and parts to set up.
This amazing CCPM control is achieved through special CCPM swashplate mixing that is preprogrammed into many of
today’s popular radio systems. Since the 120° and 140° CCPM function is preprogrammed, CCPM is no more complicated to set
up than a conventional one servo standard system. When you factor in the reduced parts count and easy programming, CCPM is
actually easier to set up and operate than many conventional systems.
For JR radio owners, please refer to the radio information contained at the front of this manual or on the following pages to
determine if your radio system has the CCPM function. For other brands of radio systems, please contact the radio manufacturer
for CCPM information. Please note that it is not possible to program a non-CCPM radio system for CCPM operation.
UNDERSTANDING CCPM CONTROL SYSTEMS
Elevator Axis
140°
JR 120°/140° 3 Servo CCPM Control System
Aileron Axis
Pitch Axis
Elevator Axis
Aileron Axis
Summary of Contents for Vigor CS
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