to follow the fuel with changes in
aircraft attitude. This is the line
through which the tank is filled.
Fuselage
– The body of an
airplane.
Glitch
– Radio problem that never
happens unless you are over trees
or a swamp.
Glow Plug
– The heat source for
igniting the fuel/air mixture in the
engine. When starting the engine
a battery is used to heat the
filament. After the engine is
running, the battery can be
removed. The wire filament inside
the plug is kept hot by the
“explosions” in the engine’s
cylinder.
See next heading and
“idle bar plug.”
Glow Plug Clip/Battery
– A 1.2-volt
battery, which is connected to the
glow plug on a model airplane
engine for starting. The battery is
removed once the
engine
is
running steadily.
Grease-in
– A very smooth, gentle
landing without a hint of a
bounce.
Hit (or to be hit)
– Sudden radio
interference which causes your
model to fly in an erratic manner.
Most often caused by someone
turning on a radio that is on your
frequency, but can be caused by
other radio sources miles away.
Horizontal Stabilizer
– The
horizontal tail surface at the back
of the
fuselage
which provides
aerodynamic pitch stability to the
airplane.
Idle Bar Plug
– This type of glow
plug has a “bar” across the tip to
help prevent raw fuel from being
splashed onto the glow element.
Too much raw fuel will cool the
plug and prevent it from igniting
the fuel/air mixture. An idle bar is
a help in obtaining a low idle
speed.
Lateral Balance
– The left-right or
side-to-side balance of an
airplane. An airplane that is
laterally balanced will track better
through loops and other
maneuvers.
Leading Edge (LE)
– The very front
edge of the wing or stabilizer. This
is the edge that hits the air first.
Muffler
– A device attached to the
exhaust stack of the
engine
to
reduce noise and increase back-
pressure which helps low speed
performance.
Note:
Most R/C
Clubs require the use of mufflers.
Muffler Baffle
– A restrictor plate
inside the muffler which reduces
engine noise. This plate can be
removed to increase power, but
only if there are no noise
restrictions where you fly.
Needle Valve
– Adjustment on a
carburetor
used to set proper
fuel/air mixture. Some carburetors
have separate needle adjustments
for low and high throttle.
Typically, turning the needle
adjustment clockwise (screwing
in) leans the mixture (less fuel)
and vice versa. However, there are
a few exceptions—refer to the
engine
manufacturer’s instructions.
NiCd
– Nickel Cadmium battery.
Rechargeable batteries which are
typically used as power for radio
transmitters
and
receivers.
Nitro (Nitromethane)
– A fuel
additive which increases a model
engine’s ability to idle low and
improves high speed performance.
Ideal nitro content varies from
engine to engine. Refer to the
engine manufacturer’s instructions
for best results. Nitro content in
fuel is indicated by the percent of
the fuel.
Ni-starter
– A self-contained
battery and glow plug clip, used
when starting the engine.
See
“glow plug clip.”
One-point landing (or a figure 9)
– Synonymous with “stuffing it
in.” Something we hope you never
do.
Pitch Axis
– The airplane axis
controlled by the
elevator.
Pitch is
illustrated by holding the airplane
at each wing tip. Raising or
lowering the nose is the pitch
movement. This is how the climb
or dive is controlled.
Power Panel
– 12-volt distribution
panel that provides correct voltage
for accessories like glow-plug
clips, fuel pumps and electric
starters. Usually mounted on a
field box and connected to a
12-volt battery.
Prop Pitch
– Props are designated
by two numbers, for instance
10 -
6
. The first number is the prop’s
length, 10". The second number is
the pitch or angle of the blades.
The 6 represents the distance the
propeller will move forward in one
revolution, in this case 6".
Re-Kitting Your Airplane
–
Changing your finished model
back into a kit, as a result of
“stuffing it in.”
Receiver (Rx)
– The radio unit in
the airplane which receives the
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