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  #1  
Unread 12-14-20, 05:26 PM
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Do modern alternators still need standby 'batteries' to restart?

Inquiring minds would like to know...
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Unread 12-14-20, 07:22 PM
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Quote:
Originally Posted by n86121 View Post
Inquiring minds would like to know...
Yes they do.
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Unread 12-14-20, 10:06 PM
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Hmmmm...

Haven’t seen anything like that in cars or boats.

Is it to recover from a situation of zero battery voltage available in flight?
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Unread 12-15-20, 07:11 PM
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Actually, cars and boats are exactly the same. Their alternators will not make power without "exciting the field" which requires electricity from their main batteries. If you lose your electrical system in one of those, its not a big deal, safety-wise at least. At little different in aircraft flying hard IFR, as these were built to do.
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