An analog computer has been used to investigate the transient performance of an advanced regenerative gas turbine. The direct simulation of the engine was a valuable tool during the design phase, giving a good understanding of the effects of regenerator time lag. The study verified the need for regenerator bypass during decelerations and permitted simplification of the control system. Use of the analog computer enabled these decisions to be made at an early stage, resulting in appreciable saving of time and money in the engine development program.

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