The Throttle Jockey is a digital speed regulator for Model Helicopters. It uses an adaptive feed-forward control algorithm to regulate rotor speed. The Jockey monitors and regulates engine speed. There are two types of rotor speed regulators, ones that measure rotor speed from the main gear and ones that measure rotor speed from the fan. The main gear measuring regulators suffer from over speed any time the rotor system is unloaded. Engine shaft regulators in an unloaded rotor system will keep the engine speed constant. The Jockey continuously adapts to the response of the engine and the demands of the pilot. Aggressive throttle commands cause the Jockey to underdamp the control loop yielding a fast response to changing loads and slowly changing throttle command cause the Jockey to overdamp the control loop yielding a smooth response to changing loads.
The Jockey employs a pulse filtering system that cleans up any hits or glitches on the auxiliary and throttle channels if used on an FM system, but for best results use a PCM system.
The jockey is designed to regulate the engine speed between 9500 and 20500rpm.The actual head speed can be calculated by dividing the engine speed by the main gear ratio.
Rotor rpm = engine rpm / gear ratio
For example, a 9:1 gear ratio would yield a regulated head speed range of 1055 to 2253 rpm.
The modelavionics website (http://www.modelavionics.com) includes the latest information, setup tips and an on-line ATV calculator.