E-flite Odyssey EP Electric Glider - Manual (Page 21)

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Activating (Arming) Switch: an external switch that prevents
the electric motor from accidentally turning on
Aerodynamics: science of air in motion
Angle of Attack (AOA): angle between the chord of the wing
and the relative wind that strikes the airfoil; independent of the
attitude of the sailplane with respect to the horizon
Auto-Peak: type of battery charger that automatically shuts off
when a battery has been fully charged
Axis: a line passing through a body about which the body
revolves
Battery Cycling: repeated charge and discharge of a battery to
erase battery memory
Battery Memory: term used to explain why a battery is unable
to take on a full charge because of insufficient discharging
before recharging
Capacity: amount of charge or electricity a battery can hold
Center of Gravity (CG): balancing point of an aircraft
Critical Angle of Attack: angle of attack at which smooth airflow
over the top of the wing stops
Electrolyte: a caustic material found in batteries
Harness: a device consisting of wires, switches, and a fuse that
connects the motor to the battery
L/D: lift divided by drag expressed as a ratio; the same as a
glide ratio (think of L/D as a glide slope, then, for a given
amount of distance, the sailplane moves forward it drops a
certain amount.)
Minimum Sink: the speed at which a sailplane loses altitude
most slowly, expressed in feet per minute
Ni-Cd (Nickel Cadium) Battery: a rechargeable battery used
for radio control airplanes
Penetrate: to make progress against the wind
Pitch: degree of nose up or nose down from level to the horizon
Relative Wind: direction that the air molecules strike the
leading edge of the wing
SCR: a battery designed to release a lot of energy over a short
time without being damaged
Span: the maximum distance from wingtip to wingtip
Stall: loss of lift resulting from exceeding the critical angle of
attack
Thermal: rising body of hot air that can take a sailplane to a
great height
Section 13: Definitions