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Covering: Made out of vinyl or polyester. Covering
has heat sensitive adhesive that, when heated, sticks to
the wood frame of the airplane. The Thermal-Air EP
uses heat sensitive polyester covering.
Covering Iron: A small hand-held iron, usually
Teflon
®
coated. It is used to heat and apply cover-
ing material.
Cycling: The act of fully charging and discharging
the flight battery. Cycling the battery increases per-
formance and duration.
Dihedral: The upward angle of each wing half. Di-
hedral creates more stability which makes learning
to fly much easier.
Dihedral Brace: Made out of plywood, aluminum
or steel, the dihedral brace strengthens the joint be-
tween different wing sections.
Elevator: The elevator is the control surface on the
back of the airplane that moves up and down. This
surface controls pitch.
EPA: An acronym for End Point Adjustments. This
is a feature found on newer radio systems that allows
you to electronically adjust the end-travel in servos.
Epoxy: A two-part glue containing a resin and a
hardener. Epoxy is available in several drying times
and is stronger than C/A glue. Epoxy is used in high
stress areas such as joining wing halves.
ESC: An acronym for Electronic Speed Control. See
Motor Controller.
Hinges: Usually made out of plastic or nylon, the
hinges connect the control surfaces to the stabilizers
or wing. They pivot, allowing the control surface to
move.
Horizontal Stabilizer: Mounted in the rear of the
airplane, the stabilizer works with the elevator to con-
trol pitch.
Landing Gear Strap: Usually made out of ny-
lon, it secures the landing gear wires to the wing
or fuselage.
Motor Controller: Usually called an electronic
speed control (ESC), the motor controller controls
the speed of the motor. Motor controllers can also be
simple on and off switches.
Peak Charger: A type of battery charger that uses a
microprocessor to sense when the flight battery is
fully charged. Once peak charged, the charger shuts
off so the battery does not overcharge.
Pushrods: They connect between the control sur-
face and the servo, transferring the movement of the
servo directly to the control surface.
Pushrod Housing: A tube that is usually nylon. The
pushrod wire runs through the housing.
Receiver: The part of the radio system that receives
the signals from the transmitter.
Root Rib: The most inboard rib of any wing panel.
Rudder: The rudder is the control surface on the
back of the airplane that moves right and left. This
causes the nose of the airplane to yaw right and left.
Servo: The part of the radio system that produces
the movement necessary to move the control surfaces.
The servo includes a small motor, gears and a circuit
board.
Servo Reversing: An option on most all new ra-
dios. Servo reversing allows you to change the
direction a servo rotates by just flipping a switch on
the transmitter.
Servo Tray: Usually made out of plywood, the servo
tray is the mounting base for the servos.
Stall Speed: The speed at which air stops moving
fast enough over the surface of a wing to keep the
airplane flying.
Thermal: Simply put, a column of warm or hot air
that rises. Birds and glider pilots enjoy flying in
thermals. Airplanes like the Thermalaire EP are spe-
cifically designed to fly in thermals.
Transmitter: The part of the radio system that you
control. It transmits the control inputs to the receiver,
which transfers that information to the servos.
Summary of Contents for Wattage Thermalaire EP
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