Patent ID: 8572974

Claim:
A fluid delivery system for a gas turbine engine, the fluid delivery system comprising: an electric motor having a variable speed; a first pump system having: a first pump driven by the motor to deliver a first fluid to the gas turbine engine, wherein the first pump comprises a fixed displacement lubrication pump driven at the variable speed to provide a lubricant from a lubricant tank to the gas turbine engine; and a fixed displacement scavenge pump driven at the variable speed, wherein the scavenge pump returns the lubricant from the gas turbine engine to the lubricant tank; and a second pump system having: a second pump driven by the motor to deliver a second fluid to the gas turbine engine, the second pump having a variable displacement; and a fixed displacement boost pump driven at the variable speed, wherein the boost pump provides fuel from a fuel tank to the second pump; wherein second pump comprises a fuel metering pump driven at the variable speed, wherein the fuel metering pump forwards the fuel from the boost pump to the gas turbine engine.