FUTABA 6J Instruction Manual page 87

propeller/spinner.
For helis: Keep in mind that a helicopter has many rotating parts, and they all cause resonance. The
helicopter will need to be tuned to reduce the amount of vibration.
‡ Retract Servo
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ATV, EPA, or AST adjustments can be made on these servos because they are not proportional. The linkage
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landing gear in a gear-up or gear-down position.
‡ Retracts
Short for retractable landing gear. Wheels and struts that fold up into the aircraft to get them out of the
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‡ Revolution Mixing
The function of the radio which mixes throttle to rudder, preventing the rotation of the helicopter during
throttle increase or decrease.
‡ Roll (maneuver)
The aircraft keeps the nose pointed in one direction while it rolls over on its back and then upright again.
‡ Roll Axis
The airplane axis controlled by the ailerons. Roll is illustrated by holding the airplane by the nose and tail.
Dropping either wingtip is the roll movement. This is used to bank or turn the airplane. Many aircraft are
not equipped with ailerons and the Roll and Yaw motions are controlled by the rudder. This is one reason
why most trainer aircraft have a larger amount of dihedral.
‡ Rudder
Hinged control surface located at the trailing edge of the vertical stabilizer, which provides control of the
airplane about the Yaw axis and causes the airplane to Yaw left or right. Left rudder movement causes the
airplane to Yaw left, and right rudder movement causes it to Yaw right.
‡ Rudder Offset
In radios with idle up functions, this specifies the amount of tail rotor pitch in the different idle up
conditions.
‡ Rudder-to-Aileron
Mix used to counteract undesirable roll which often happens with rudder input, especially in knife edge,
also called roll coupling.
‡ Rudder-to-Throttle
This heli mix adds a small amount of throttle to counter the added load on the main gear from increasing the
pitch of the tail blades, helping to maintain a constant headspeed during rudder application. (This is a minor
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