For simulating the performance of a two-shaft regenerative gas turbine with variable nozzles on the power turbine, a mathematical model for the whole system engine-control unit-vehicle was programmed on an analog computer. This paper reports on a study carried out to discover the extent to which the acceleration of the car is influenced by the following parameters: (a) Idle speed of gas generator; (b) Power consumption of auxiliary units; (c) Transmission with a hydrokinetic torque converter; (d) Time constants of temperature gauge and fuel metering system; (e) Variation of nozzle opening during acceleration; (f) Ambient conditions.

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