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120 Three-Servo CCPM Swashplate Mixing (Venture 30 CP)
The JR 120° CCPM or Cyclic/Collective Pitch Mixing, system offers the user a control system that can accomplish the same control
inputs as the One-Servo standard system mentioned above, 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° from each other, hence the 120° 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 and important 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 to 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° 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 page 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 SWASHPLATE CONTROL SYSTEMS (CONTINUED)
Elevator Axis
120°
JR 120° 3 Servo CCPM Control System
Aileron Axis
(A)
(B)
(C)
