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Re: Questions about operation of EMD radiator fans
Author: BN Oly
Date: 08-11-2013 - 14:33

Samnberry Wrote:
-------------------------------------------------------
> The fan motors on SD9 and GP9's are 3 phase ac
> motors powered from a separate winding on the main
> generator, so as the engine speed changes from
> throttle position the fan speed will change. Just
> info.

Thats an interesting fact there, that would explain why I've never been able to figure out why hood unit 567 geeps seem to have such a distinct howl to them that rises and falls with engine RPM.. its got to be the fans. I always thought it was a different roots blower or something that caused it. Very cool! Thanks,

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Subject Written By Date/Time (PST)
  Questions about operation of EMD radiator fans BN Oly 08-10-2013 - 23:39
  Re: Questions about operation of EMD radiator fans Butler 08-11-2013 - 07:53
  Re: Questions about operation of EMD radiator fans SP5103 08-11-2013 - 08:49
  Re: Questions about operation of EMD radiator fans Samnberry 08-11-2013 - 12:31
  Re: Questions about operation of EMD radiator fans BN Oly 08-11-2013 - 14:33
  Re: Questions about operation of EMD radiator fans Shortline Sammie 08-11-2013 - 15:47
  Re: Questions about operation of EMD radiator fans George Andrews 08-12-2013 - 13:49


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