From: "Charlie England" <flyrotary@lancaironline.net>
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Date: Mon, 17 Apr 2017 07:49:27 -0500
Message-ID: <CAHxyc53ZaqaVoKqD_y5q1drq8Bx2Jz==eUXnmc71D54pn1krfA@mail.gmail.com>
Subject: Re: [FlyRotary] Permanent Magnet Backup Generator
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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On Mon, Apr 17, 2017 at 4:31 AM, Todd Bartrim <flyrotary@lancaironline.net>
wrote:

> Many years ago we discussed on the list various ways to implement backup
> electrical sources for our electrically dependent engines. A great amount
> of discussion was around permanent magnet type of generators.
>    An idea was hatched and discussed, then forgotten. Except I didn't.
> Some years and a few sleepless nights later I set upon achieving this. Most
> of the work was done and reported to the list quite a few years back, but
> at that time I knew I had to set it aside for some time as I had other
> commitments.
>   At last report I had finalized the mechanical aspect but had made no
> attempt to integrate it into the electrical system. I've now finalized this
> and yesterday ran the engine for the first time. Everything worked
> excellent! So far it seems to have been a tremendous success.
>   So I have updated my word document of the procedures for this
> modification. Including a wiring diagram.
> For your entertainment I've put it on Google Drive in Word format where it
> can be accessed at the following link
> https://drive.google.com/file/d/0B9-1Iqfk8J8nRmUwWGpLWnRvaWc
> /view?usp=sharing
>
> or for us Linux types in .odt
> https://drive.google.com/file/d/0B9-1Iqfk8J8ncVBEbVFWQjR3OFE/view?
> usp=sharing
>
> Comments, criticisms welcome
>
> Todd Bartrim
>  RV9a 13BTurbo
>
Thanks for the great writeup. I took the easy way out & just added a 2nd ND
alternator where the a/c compressor normally rides on a Renesis, but it
would be nice to save ~5 lbs using the motorcycle alt.

Given that the mod is do-able on a stock RWS drive, if anyone ever decides
to resume production it would be nice to tweak the dimensions on the input
end enough to allow a simple bolt-on of all the components.

Charlie

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Mon, Apr 17, 2017 at 4:31 AM, Todd Bartrim <span dir=3D"ltr">&lt;<a =
href=3D"mailto:flyrotary@lancaironline.net" target=3D"_blank">flyrotary@lan=
caironline.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 dir=3D"ltr">Many years ago we discussed on the list various ways to implem=
ent backup electrical sources for our electrically dependent engines. A gre=
at amount of discussion was around permanent magnet type of generators.=C2=
=A0<div>=C2=A0 =C2=A0An idea was hatched and discussed, then forgotten. Exc=
ept I didn&#39;t. Some years and a few sleepless nights later I set upon ac=
hieving this. Most of the work was done and reported to the list quite a fe=
w years back, but at that time I knew I had to set it aside for some time a=
s I had other commitments.=C2=A0</div><div>=C2=A0 At last report I had fina=
lized the mechanical aspect but had made no attempt to integrate it into th=
e electrical system. I&#39;ve now finalized this and yesterday ran the engi=
ne for the first time. Everything worked excellent! So far it seems to have=
 been a tremendous success.</div><div>=C2=A0 So I have updated my word docu=
ment of the procedures for this modification. Including a wiring diagram.=
=C2=A0</div><div>For your entertainment I&#39;ve put it on Google Drive in =
Word format where it can be accessed at the following link</div><div><div><=
a href=3D"https://drive.google.com/file/d/0B9-1Iqfk8J8nRmUwWGpLWnRvaWc/view=
?usp=3Dsharing" target=3D"_blank">https://drive.google.com/file/<wbr>d/0B9-=
1Iqfk8J8nRmUwWGpLWnRvaWc<wbr>/view?usp=3Dsharing</a><br></div><div><br></di=
v><div>or for us Linux types in .odt</div><div><a href=3D"https://drive.goo=
gle.com/file/d/0B9-1Iqfk8J8ncVBEbVFWQjR3OFE/view?usp=3Dsharing" target=3D"_=
blank">https://drive.google.com/file/<wbr>d/0B9-<wbr>1Iqfk8J8ncVBEbVFWQjR3O=
FE/view?<wbr>usp=3Dsharing</a><br></div><div><br clear=3D"all"><div><div cl=
ass=3D"m_5872150124600396468gmail-m_-3382389146696261499gmail_signature"><d=
iv>Comments, criticisms welcome</div><span class=3D"HOEnZb"><font color=3D"=
#888888"><div><br></div><div dir=3D"ltr">Todd Bartrim</div><div>=C2=A0RV9a =
13BTurbo</div></font></span></div></div>
</div></div></div>
</blockquote></div>Thanks for the great writeup. I took the easy way out &a=
mp; just added a 2nd ND alternator where the a/c compressor normally rides =
on a Renesis, but it would be nice to save ~5 lbs using the motorcycle alt.=
</div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">Given=
 that the mod is do-able on a stock RWS drive, if anyone ever decides to re=
sume production it would be nice to tweak the dimensions on the input end e=
nough to allow a simple bolt-on of all the components.</div><div class=3D"g=
mail_extra"><br></div><div class=3D"gmail_extra">Charlie</div></div>

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