Hobbico Awarf Series Manual Download Page 38

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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.

Roll Axis

– The airplane axis

controlled by the

ailerons.

Roll is

illustrated by holding the airplane
by the nose and tail. Dropping
either wing tip 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.

Root

–

See “Wing Root.”

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.

Servo

– The electro-mechanical

device which moves the control
surfaces or throttle of the airplane
according to commands from the

receiver.

The radio device which

does the physical work inside the
airplane.

Servo Output Arm

– The

removable arm or wheel which
bolts to the output shaft of a servo
and connects to the

pushrod.

Shot down

– A “hit” that results in

a crash landing. Sometimes
caused by radios miles away.

Slop

– Unwanted, excessive free

movement in a control system.
Often caused by a hole in a servo
arm or control horn that is too big
for the pushrod wire or clevis pin.
This condition allows the control
surface to move without
transmitter stick movement.

Also,

see “flutter

.”

Solo

– Your first totally unassisted

flight that results in a

controlled

landing.

Spinner

– The nose cone which

covers the hub of the propeller.

Sport Airplane

– A model which

possesses some attributes of many
of the specialty airplanes and are
best for general flying as they are
the most versatile and durable.

Stall

– What happens when the

angle of attack is too great for the
wing to generate lift regardless of
airspeed. When the wing cannot
generate lift, the model “falls out
of the sky” until sufficient airspeed
is gained. Then, you can get
control of the model – this takes
altitude and should be avoided
upon takeoff! (Every airfoil has an
angle of attack at which it
generates maximum lift – the
airfoil will stall beyond this angle).

Switch Harness –

The on/off

switch for the

flight pack

which is

mounted in an accessible location
on the

fuselage.

Tachometer

– An optical sensor

designed specifically to count light
impulses through a turning
propeller and read out the engine
RPM.

Throw

– The distance a control

surface (such as elevator, aileron,
rudder) can travel. Throw is measured

at the trailing edge of the control
surface.

Tip stall

– The outboard end of

one wing (the tip) stops
developing lift, causing the plane
to roll suddenly in the direction of
the stalled wing. This situation is
not fun when you are only a few
feet off the runway trying to land.

Track

– The path the model takes

through the air or on the ground.

Trainer Airplane

– A model

designed to be inherently stable
and fly at low speeds, to give first-
time modelers time to think and
react as they learn to fly.

Trailing Edge (TE)

– The rearmost

edge of the wing or stabilizer.

Transmitter (Tx)

– The hand-held

radio controller. This is the unit
that sends out the commands that
you input.