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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.
Exponential Rate
Offers servo travel that is not directly proportional to stick travel. Control response is milder below half-
stick, but becomes increasing stronger as stick travel approaches 100%. Great for aerobatics and trouble
situations.
Fail Safe
A safety feature which turns a servo to a preset position if the signal is lost or interrupted. Additionally,
battery fail-safe is a safety feature which brings the throttle servo down to idle as a warning that the receiver
Fairing
wing fairing joins the wing and fuselage. A landing gear fairing streamlines the landing gear struts, and
Field charger
A fast battery charger designed to work from a 12-volt power source, such as a car battery.
Fin, Vertical Fin
Flap-to-elevator mixing (Air and 2-servo gliders only)
Flaperons
Flaps
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.
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