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Do the -01 versions for the KI-227 and KI-228 replace the need for an RMI?

April 26, 2017replace RMI versions

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Do the -01 versions for the KI-227 and KI-228 replace the need for an RMI?

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Not completely. The -01 versions include a stepper motor that is driven from the directional gyro within the compass system. Therefore, when the aircraft turns, both the compass card on the HSI and ADF indicator will turn accordingly. Unlike an RMI, however, these ADF indicators must be synchronized to the HSI compass card by rotating the SYNC knob until its heading matches the HSI. An RMI automatically updates the heading on the compass card.