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1. 09:16 AM - Re: Ford Voltage Regulator vs Solid state (Robert L. Nuckolls, III)
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Subject: | Re: Ford Voltage Regulator vs Solid state |
At 04:09 PM 5/21/2015, you wrote:
>
> >> is this $180 unit really that much better than the $25 legacy Ford unit?
>
>My experience in my Cessna is that the modern automotive units go into a
>voltage runaway if the overvoltage unit trips, or you turn off the
>alternator side of the master switch. Bad thing. The only way to recover is
>to shut down the engine, thereby stopping alternator power generation.
>That's not practical in the air.
>
>Paul
There's a reason for this phenomenon. It has roots in
the aviation adaptation of the legacy Ford regulators onto
aircraft. We had a discussion about this a few years back.
The attached .pdf is a snapshot of that discussion.
Bottom line is that the Ford style regulators are good
and useful device when wired as shown in the 'Connection
and the pages of this List. However, one should not
emulate the manner in which Cessna adapted this regulator
to their production aircraft. It was a good thing while
the regulators retained their original form-fit-function
but as the solid state replacements adapted to brand-and-
model-unique automotive products, their ability to function
in a Cessna was compromised.
Bob . . .
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