Horizon Hobby UK

Tachometer
An optical sensor designed specifically to count light impulses through a turning propeller and read out the engine rpm.

Tail dragger
This is were the plane has two main landing legs in the wing up and a tail wheel mounted at the rear of the fuselage, or onto the lower part of the rudder

Tail wheel
A wheel at the rear of the plane

Throttle
A variable control in the carburettor that increases or decreases the fuel/air mix to the engine, used to control engine speed.

Throttle curve
A programming function of the radio that allows the throttle operation to be adjusted at various points along the throttle movement to produce a linear movement.

Throttlehold
A function on a radio transmitter that once set will hold the throttle in a pre- determined position.

Thrust
The force provided by the engine/propeller or to move the model through the air.

Torque
Describes the amount of pull or power that a servo or engine generates, lifting or pulling power.

Trailing edge
The most rearward edge of the main wing, stabilizer, or control surface.

Trainer Airplane
A model plane designed to be inherently stable with relatively easy flight characteristics, allowing new pilots time to respond to flight changes.

Trainer system
Allows an instructor to teach a new pilot to fly using a master and slave transmitter system, connected by a trainer lead. Usually known as the buddy box system.

Transmitter
This is the hand held part of the radio system that transmits radio signals to the receiver in the model.

Tricycle gear
The landing gear in the plane will have a nose leg at the front and then the main undercarriage mounted in the wing or fuselage.

TX
An abbreviation used to describe the transmitter.

Undercamber
The underside of the wing section has a curve when looked at from the side.

Ventral fin
Small vertical fin attached to the bottom of a fuselage.

Vertical fin
This is the tail mounted vertical surface that the rudder is attached to.

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