Gas turbine on and off to run it only at high efficiency. The emergence of the continuously variable transmission may also alleviate the responsiveness problem. Turbines have historically been more expensive to produce than piston engines, though this is partly because piston engines have been mass-produced in huge quantities for decades, while small gas turbine engines are rarities; however, turbines are mass-produced in the closely related form of the turbocharger. The turbocharger is basically a compact and simple free shaft radial gas turbine which is driven by the piston engine's exhaust gas. The centripetal turbine wheel drives a centrifugal compressor wheel through
Turbine-electric transmission generator is operated when the gas turbine engine is running and also when the motor's battery needs charging. The aircraft gas turbine engine system, patent number 5,867,979, is a gas turbine engine that is mounted on an aircraft, which the system generates and utilizes electrical and other power. The gas engine turbine system’s core is made up of a compressor, a three shaft propulsive gas turbine engine, which has three electrical generators. Each generator is connected to one segment of the shaft, which is part of the engine. Then a propulsive fan is driven by the compressor and the generators.