Single servo mixing
Single servo mixing (also called mechanical CCPM or non-CCPM, or ) is a method of control where each of the helicopter's natural axes of control (namely roll, pitch and yaw and collective pitch) are controlled via a separate servo; in contrast to electronic CCPM where the roll, pitch and collective pitch inputs are mixed together and each axis is controlled by coordinated movements of at least two servos.
Single servo mixing is also used for controlling simulators (though some can electronically de-mix the signal if needed). Stock transmitters for ready to fly collective pitch helicopters often come preset using CCPM mixing, which can be difficult to impossible to turn off.
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