Dynaflite DYFA2018 - Manual (Page 6)

Gusset: A brace used to reinforce the joint
between two parts.
High-start: A device used to launch a model
glider like a slingshot. This device consists of a
stake, an elastic tube, monofilament line (or
string), a parachute or streamer and a ring for
attaching the high-start to the glider.
Laminate: The process of gluing a multiple
number of sheets face-to-face to increase
strength.
Horizontal Stabilizer: The non-moving horizontal
tail surface at the back of the fuselage which
provides aerodynamic pitch stability.
Pitch Axis:The sailplane axis controlled by the
elevator. Pitch is illustrated by holding the
sailplane at each wingtip. Raising or lowering
the nose is the pitch movement. This is how the
climb or dive is controlled.
Pushrod: A rigid piece of steel, plastic or wood
used to transfer movement from a servo to a
control surface.
Receiver (RX):The radio unit in the sailplane
which receives the transmitter signal and relays
the control to the servos. This is somewhat
similarto the radio you may have in yourfamily
automobile, except the radio in the glider
perceives commands from the transmitter and
the radio in your car perceives music from the
radio station.
Rudder: Hinged control surface located at the
trailing edge of the vertical stabilizer, which
provides control of the sailplane about the yaw
axis and causes the sailplane to yaw left or
right. Left rudder movement causes the sailplane
to yaw left and right rudder movement causes it
to yaw right.
Sailplane: An airplane which flies without an
engine. Sailplanes are designed to ride on
warm, rising air currents, called thermals.
Sailplanes are launched by several methods: a
giant sling shot called a high-start or a winch
which pulls the sailplane up like a kite.
Servo: The electronic/mechanical device which
moves the control surfaces of the sailplane
according to the commands from the receiver.
The radio device which does the physical work
inside the sailplane.
Servo Arm:The removable arm or wheel which
bolts to the output shaft of a servo and connects
to the pushrod.
Tow Hook: A device used to connect the tow
line to the sailplane during launch.
Transmitter: The hand-held radio controller.
This is the unit that sends out the commands
that you input.
Vertical Stabilizer: The non-moving surface
that is perpendicular to the horizontal stabilizer,
often referred to as the fin, providing lateral
stability. The rudder attaches to this surface.
Wing:The main lifting surface of an airplane.
Yaw Axis: The glider axis controlled by the
rudder. Yaw is illustrated by hanging the glider
level by a wire located at the center of gravity.
Left or right movement of the nose is the yaw
movement. Many gliders are not equipped with
ailerons and the roll and yaw axis are controlled
by the rudder. This is due to the larger amount
of dihedral in the wing and is why most
sailplanes have a large amount of dihedral.
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