Glossary Of Terms - Hangar 9 ARROW Instruction Manual

Glossary of Terms

• Ailerons: Each side of this airplane has a hinged control
surface (aileron), located on the trailing edge of the wing. Move
the aileron stick on the transmitter left, the left aileron moves up
and the right aileron moves down. Moving the left aileron up
causes more drag and less lift, causing the left wing to drop
down. When the right aileron moves down, more lift is created,
causing the right wing to rise. This interaction causes the
airplane to turn or roll to the left. Perform the opposite actions,
and the airplane will roll to the right.
• Carburetor: By adjusting the needle valve in the carburetor,
you control the engine' s lean/rich fuel mixture and set the
engine for correct operation.
• Charger: This is the device used to charge/recharge batteries.
If Ni-Cd batteries are provided with the radio, a charger is
usually provided as well.
• Clevis: The clevis connects the wire end of the pushrod to the
control horn of the control surface. A small clip, the clevis has
fine threads so that you can adjust the length of the pushrod.
• Clunk: Located inside the fuel tank, a clunk is weighted and
ensures that the intake line has a steady supply of fuel regard-
less of the altitude of the airplane.
• Control Horn: This arm connects the control surface to the
clevis and pushrod.
• Control Surfaces: The moveable part of the wing and tail that
cause the aircraft to roll (aileron), pitch (elevator) or yaw (rudder).
• Dead Stick: When the airplane is in flight, gliding without the
engine running, it is called "dead stick."
• Dihedral: The degree of angle (V-shaped bend) at which the
wings intersect the fuselage is called dihedral. More dihedral
gives an airplane more aerodynamic stability. Some sailplanes
and trainer planes with large dihedral dispense with ailerons
and use only the rudder to control the roll and yaw.
• Electric Starter: This is the small motor commonly used to
start the airplane' s engine.
• Elevator: The hinged control surface on the back of the
stabilizer that moves to control the airplane' s pitch axis. Pulling
the transmitter' s control stick toward the bottom of the transmitter
moves the elevator upward, and the airplane begins to climb.
Push the control stick forward, and the airplane begins to dive.
• Expanded Scale Voltmeter (ESV): This device is used to
check the voltage of the battery pack.
• Flight Box: The box in which you store and transport your
flying equipment is called a flight box.
• Flight Pack or Airborne Pack: These interchangeable terms
describe the radio equipment that is installed on the airplane.
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• Fuel Overflow Line (Vent): This line connects to the muffler
and pressures the fuel tank when the engine is running. It also
functions as an overflow line when the fuel tank is full.
• Fuel Pickup Line: This line connects the fuel tank to
the carburetor.
• Fuselage: The main body of an airplane.
• Glow Plug Clip/Battery: A 1.2-volt battery with a clip that is
connected to your engine' s glow plug and is used to start the
engine. You remove it once the engine is running smoothly.
• High Wing: The term describes an airplane that has its wing
mounted on the top of the fuselage.
• Hinge: Flexible pieces used to connect the control surface to
the flying surface. All hinges must be glued properly and
securely to prevent the airplane from crashing. (This has already
been done for you on the Arrow Advanced trainer.)
• Horizontal Stabilizer: The horizontal flying surface of the tail
gives the airplane stability while in flight.
• Leading Edge: The front of a flying surface.
• Main Landing Gear: The wheel and gear assembly the
airplane uses to land. It is attached to the bottom of the fuselage.
• Muffler: This device muffles engine noise and increases the
back pressure from the engine' s exhaust stack, which can
improve the engine' s performance at low speeds. RC clubs usu-
ally require mufflers.
• Needle Valve: This mechanism within the carburetor adjusts
the fuel mixture. Refer to your instructions for
directions on how to adjust the needle valve.
• Ni-Cd: This abbreviation stands for Nickel Cadmium, the
chemical compound used in rechargeable batteries.
• Nitro: Short for nitromethane, a fuel additive that improves
an engine' s performance. 10% to 15% nitro content is
recommended for the Evolution engine.
• Nose Gear: The part of the landing gear that is attached to the
nose of the fuselage. The nose gear is usually connected to the
rudder servo to help you steer the airplane on the ground.
• Pitch Axis: The horizontal plane on which the airplane' s nose
is raised or lowered. By moving the elevator, you can raise the
airplane' s nose above the pitch axis (climb) or lower it below the
pitch axis (dive).
• Pushrod: The rigid mechanism that transfers movement from
the servo to the control surface.
• Receiver: The receiver unit in an airplane receives signals from
the ground transmitter and passes the instructions along to the
airplane' s servos.