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• Roll Axis: The horizontal plane on which the airplane’s wings
are raised or lowered. By adjusting the ailerons, you can drop a
wing tip below the roll axis and cause the airplane to bank or roll.
• Rudder: The hinged control surface on the vertical stabilizer
that controls the airplane’s yaw. Moving the rudder to the left
causes the airplane to yaw left; moving the rudder to the right
causes it to yaw right.
• Servo: The servo transforms your ground commands into
physical adjustments of the airplane while it’s in the air.
• Servo Output Arm: A removable arm or wheel that connects
the servo to the pushrod (also called servo horn).
• Spinner: Term describing the nose cone that covers the
propeller hub.
• Switch Harness: This switch is commonly located on the
fuselage and governs the On/Off mechanism for the flight pack.
• Tachometer: A device that measures the engine’s rpm (rotations
per minute) by counting light impulses that pass through the
spinning propeller.
• Threadlock: A liquid that solidifies; used to prevent screws
from loosening due to vibration.
• Torque Rods: Inserted into the ailerons, these rigid wire rods
run along the wing’s trailing edge, then bend downward and
connects to the pushrod.
• Trainer Airplane: Designed to fly with high stability at low
speeds, a trainer model airplane allows new pilots some extra
reaction time as they learn to control an airplane.
• Transmitter: The device used on the ground to transmit
instructions to the airplane.
• Vertical Stabilizer: The vertical flying surface of the tail gives
an airplane stability while in flight.
• Wheel Collar: The round retaining piece that anchors wheels
in place on the wheel axle.
• Wing: The lifting surface of an airplane.
• Yaw Axis: The vertical plane through which the airplane’s nose
rotates as it yaws to the left or to the right. The rudder controls
the yaw axis.
• Z-Bend: The wire ends of pushrods have Z-shaped bends that
attach to the servo.
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