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Which of the following thrust modulation technique makes use of symmetric injection for jet area control?

Which of the following thrust modulation technique makes use of symmetric injection for jet area control? Correct Answer Throat Shifting Thrust Modulation

In Throat Shifting Thrust Modulation (TSTM), by shifting the throat of the nozzle, thrust is controlled. For modulation of thrust, the jet area is controlled using symmetric injection near the throat.

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