FUTABA 6J Instruction Manual page 86

Pitch Curve
The programming function of the radio which aids in setting the hover point, and end points of the blade
pitch in the collective mix.
Pitch to rudder (Heli programming only)
Also known as a revolution mix or a tail rotor mix, counters the torque caused by adding pitch with opposite
direction rudder command to keep the helicopter from rotating or revolving as a result of the increased
torque. Not required with the use of a heading-hold gyro, which self-counters the torque-caused movement.
‡ Pitch Trim
Offsets the entire heli pitch curve, increasing or decreasing responsiveness proportionally at all points.
‡ Programmable mix (Pmix)
Used to cause specific servo responses to specific inputs separate from the basic control set-ups. For
example, used to mix 2 servos to operate in tandem to move a rudder on giant scale aircraft, or to mix
smoke activation based upon throttle stick position.
‡ Pull-Pull
A linkage setup using two rods or wires. One is pulled for one direction, the other is pulled for the other.
Push-Pull
A linkage setup using two rods. One rod pushes, while the other pulls.
‡ RPM
How fast something turns. It means Revolutions Per Minute. It is both singular and plural.
‡ Receiver (Rx)
The radio unit in the aircraft which receives the transmitter signal and relays the control to the servos. This
is somewhat similar to the radio you may have in your family automobile, except the radio in the airplane
perceives commands from the transmitter, while the radio in your car perceives music from the radio
station.
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‡ Reset (Return to default)
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‡ Resonance
This is the increased vibration (or amplitude of oscillation) of system when acted upon by a force whose
frequency is close to or equal to the normal frequency of the system. When the resonance of many parts of
a machine are in synch, the whole machine will vibrate at a greater rate and can be damaged. Resonance
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