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An engine design where the cylinders are designed symmetrically around a central crankshaft and hence radiate out.
See also: 1/6th Kinner Radial model built by Mick Cherry.
A moulded plastic or metal mount which is fastened to the mounting lugs of an engine and then bolted directly to the engine bulkhead or firewall.
See also: Radio Frequencies.
Do you know your radio frequencies and use?
A type of jet engine with very few moving parts which consists of a specially shaped tube open at both ends in which air is compressed purley from the forward speed. The addition of fuel and this being then ignited increases the volume of air. Note that ramjets only operate above certain speeds.
A measure of the speed with which an airplane rotate around its long axis, or roll. This is normally measured in degrees per second.
A switch on the transmitter which changes the amount of movement of a control surface when the stick is moved.
The maximum distance over which radio control can safely be maintained.
A reversal of the camber on a flying surface. Often used on flying wing or delta planform aircraft.
Air drag, or the opposition of the air to being displaced by the forward movement of an aeroplane.
Resonance's occur when the source of vibration has a frequency that coincides with one of the natural frequencies of the structure.
The cross-section shape of a wing, from leading to trailing edge.
A rotation of an aircraft around the longitudinal axis. This effect is produced by the ailerons.
Provided by the ailerons.
The part of a wing where it meets the fuselage.
Rotary engines were used extensively in early aircraft. Note that with a rotary engine the crankshaft is fixed and does not rotate, the propeller is fixed to the crankcase and the whole crankcase rotates with the propeller.
The fuel is supplied to the engine through the crankshaft and the engine normally exhausts straight out the top of the cylinder. This arrangement was used with early engines as the mass of the engine was used as the flywheel allowing the engine to run smoothly.
A steam / compressed air / CO2 5 cylinder rotary engine is described in our gallery.
See also: Engine Configurations.
The moving part of the vertical tail surface of an aeroplane which provides yaw control.
A crank that converts linear motion into rotary motion. This may be used for linkages such as those used for nose wheel steering.
See also: Servo.