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Subject: Re: (Avionics) How can this circuit produce an "inductive surge"?
Date: Thu, 26 Sep 2002 22:26:22 +0100
Organization: (Posted via) GTS Netcom.
NNTP-Posting-Date: Thu, 26 Sep 2002 21:20:02 +0000 (UTC)
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"Dennis O'Connor" wrote:
>Yes... Common knowledge is commonly wrong... The alternator cannot run away
>during engine cranking and fry the electronics... Leaving the radios on
>during engine start up and shut down involves no more risk of overvoltage
>than at any other time or point in flight... small battery at a critical time>
Nothing I have seen so far contradicts what you say - especially as
the operating input voltage range of e.g. 24V avionics is normally up
to about 36V (e.g. Bendix King).
So what is going on? I do know of several people who blew up their
avionics, reportedly during engine start/stop operations.
OK, all it takes is a dodgy connection to the voltage regulator, and
you might get 50V or more...
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