Today's Message Index:
----------------------
1. 09:15 AM - Re: Matronics List Forum Web Site Fully Restored... (Larry Mac Donald)
2. 09:35 AM - Re: SD8 - rewinding for 28V (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: Matronics List Forum Web Site Fully Restored... |
Matt,
I have been subscribed to several of your lists but for at least two
years I havent received one message. Since you now have the data
base fixed, will I start receiving messages ?
Larry Mac Donald
lm4@juno.com
> On Aug 25, 2021, at 7:34 PM, Matt Dralle <dralle@matronics.com> wrote:
>
>
> Dear Listers,
>
> There has been an issue with the database used to drive the Matronics Lists Forums
Web Site for a few days. I finally got to the bottom of the issue today.
It appears the functionality has been fully restored.
>
>
> Matt Dralle
> Matronics List Administrator
>
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Message 2
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| Subject: | Re: SD8 - rewinding for 28V |
At 11:13 PM 8/25/2021, you wrote:
>
>I have a SD8 alternator (14V) on the shelf and a 28V single
>alternator system in the hangar.
>
>Under the guide of education and recreation, I wonder if I could
>disassemble the SD8 and rewind it with more turns of smaller wire to
>make it more appropriate for a 28V application?
>
>Conceptually this is a simple idea, but I wonder if in practice I
>will have issues like losing strength in the magnets when I
>disassemble the alternator, or it being impossible to remove the
>existing windings without damage to the stator, etc.
>
>Any and all input welcome.
It is possible/practical to rewind the SD8 stator
for other performance goals. There are no risks to
the hardware for having disassembled it.
You basically need to double the number of turns
per pole and use smaller wire so that the increased
turns do not overrun the available space.
Count the turns on each pole as it's disassembled
and note the wire routing between poles for
installing the new winding.
Remember that cross section of the wire varies
as square of diameter. So for 1/2 the area, you'll
need wire on the order of 0.7x the diameter of
the original.
Good luck! Let us know what you discover.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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