Dynaflite PT-19 - Manual (Page 31)

Epoxy -A two-part resin/hardener glue that is
extremely strong. It is generally available in 6 and
30-minute formulas. Used for critical points in the
aircraft where high strength is necessary.
Expanded Scale Voltmeter (ESV) -Device used to
read the battery voltage of the on-board battery
pack or transmitter battery pack.
Field charger -A fast battery charger designed to
work from a 1 2-volt power source, such as a
car battery.
Flaps -Hinged control surface located at the trailing
edge of the wing inboard of the ailerons. The flaps
are lowered to produce more aerodynamic lift from
the wing, allowing a slower takeoff and landing
speed. Flaps are often found on scale models, but
usually not on basic trainers.
Flare -The point during the landing approach in
which the pilot gives ah increased amount of up
elevator to smooth the touchdown of the airplane.
Flight Box -A special box used to hold and transport
all equipment used at the flying field.
Flight Pack -or Airborne pack - All of the radio
equipment installed in the airplane, i.e.. Receiver,
Servos, Battery, Switch harness.
Flutter -A phenomenon whereby the elevator rudder,
or aileron control surface begins to oscillate violently
in flight. This can sometimes cause the surface to
break away from the aircraft and cause a crash.
There are many reasons for this, but the most
common are excessive hinge gap or excessive "slop"
in the pushrod connections and control horns. If you
ever hear a low-pitched buzzing sound, reduce
throttle and land immediately.
Fuel Pick-Up Line -The fuel line in the fuel tank
through which fuel travels to the carburetor. Typically
a flexible tube with a weight or "Clunk" on the end
which allows it 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.
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.
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.
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.
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.
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 clockwise
(screwing in) leans the mixture (less fuel), and vice
versa. However, there are a few exceptions—refer to
the engine manufacturer's instructions.
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