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Old September 25th, 2008, 17:18   #21
SpiraMirabilis
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Default Re: Turbo props running in feather before shutdown

I did a little research in my systems book and asked someone else and came to this conclusion --

In the Dash-8 there is a prohibited/yellow RPM range (500-780rpm) which the ECU will keep Nh set as such to either be above or below it. Above feather/disc the ECU will keep the Nh up to keep the RPM above 780rpm. Going to feather allows the Nh to stabilize temperatures for fuel cut off.
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