Abstract: A speed-responsive governor arrangement has a lever which is movable by a governor device. A spring-loaded transmission device is engaged between an arm of the lever and an opposed face of a cam element, so that a torque applied to the lever, opposing that applied by the governor device, is dependent on the positions of the transmission device and the cam element. The cam element has a further face which rests on rollers, so that the position of the cam element may be varied. The positions of the rollers are themselves adjustable.

Abstract: A fuel control system for a gas turbine engine includes a variable metering device from whose downstream side a pair of passages lead respectively to pilot and main engine burners. A throttle valve controls flow to the main burners and is urged open by the pressure downstream of the metering device. A biasing spring urges the throttle valve shut and the bias applied by the spring is variable in accordance with engine speed or during starting of the engine. Variation in spring bias is applied through alteration in the position of a spill valve connected across the metering device.

Abstract: A Fire seal is formed in three layers, an elastic inner tube which is inflatable, a resilient fire resistant felt surrounding the tube, and a wear resistant rubber impregnated outer layer.

Abstract: A fuel control system for a gas turbine engine includes a metering device having a sleeve which is movable to vary fuel flow to the engine. A stop cooperates with the sleeve to define a minimum fuel flow. The stop is movable between a first, normal running position and a second, engine starting position, the second position corresponding to a smaller minimum flow through the metering arrangement.