A fuel system (10) including a fuel pump metering unit (FPMU) for delivering fuel to an engine manifold with an ecology valve (20) for draining and storing fuel from the engine manifold. The ecology valve (20) includes a housing (21) having a piston (24) d...

A method from discriminating between spurious and genuine surges in a gas turbine engine is provided which includes the steps of receiving an engine speed signal over a global engine surge investigation region that includes a plurality of operating regions...

A power turbine speed control system (10) for a helicopter is disclosed which includes a) means for generating a power turbine speed signal (NF) and a power turbine shaft torque signal (QS) from a power turbine and rotor drive train; b) filtering means (40...

Fuel control systems for use with a gas turbine engines which accounts for real-time thermodynamic engine effects when attempting to match or track the NDOT Actual rate to the NDOT Demand rate. The fuel control system includes a mechanism for measuring sev...

The subject invention is directed to a new and useful method of detecting in-range engine sensor faults for a gas turbine engine associated with a helicopter. The method includes the steps of computing engine shaft horsepower for a plurality of engine sens...

A system is disclosed for determining the total torque required at the main and tail rotors of a helicopter for use in feed-forward rotor torque anticipation which includes a polynomial neural network adapted and configured to predict the aerodynamic torqu...

A system for performing feed-forward anticipation of rotor torque demand on a helicopter engine is disclosed which includes a flight control computer adapted and configured to predict the total torque required at the main and tail rotors of the helicopter,...