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Thread: PW1100G in depth start-up sequence
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Old 30th October 2020 | 21:09
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tdracer
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I don't know about the PW1000G, but the LEAP uses "pulse width modulation" to control N2 - i.e. the starter air valve is rapidly opened and closed to maintain the desired N2 speed.
I'd be very surprised is there any physical mechanism to prevent N1 rotation - first off the failure modes are outright nasty, and there is no need to keep the fan from rotating.
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