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15. Gas turbine engine

What unit in a tachometer system sends information to the indicator?

  • The two phase AC generator.
  • The three phase AC generator.
  • The synchronous motor.

Explanation from PART66Online

A synchronous tachometer system uses a small three-phase AC generator driven by the engine; its three-phase output sets the speed of the synchronous motor in the indicator. The generator, not the indicator motor, is the unit that sends the speed information.

A

abhishek asked · 11 Feb 2012

It must be synchronous motor.

Community Comments (1)

P
PART66Online 11 Feb 2012
Hey.

You wrong. The three phase AC generator sends information to the indicator.
Please refer to Jeppesen Aircraft Gas Turbine Powerplants page 12-13.

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