From: "Andrew Martin andrew@martinag.com.au" <flyrotary@lancaironline.net>
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Date: Sat, 16 Nov 2019 07:49:56 +0800
Message-ID: <CAJxaVD0Tgm3tH4X2=MOVF7QwT9t_Dn0QcoijP27Cd4tGaZ4BRQ@mail.gmail.com>
Subject: Re: [FlyRotary] Electrical power
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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I wont give schematics as mine grew into a mess as I built the plane and
also needs cleaning up.
But as for power supply.
Main power is 80a alternator, modified to external B&C regulator.
Backup power is 40ah starting battery. Avionics buss has small agm battery
connected through switch & diode to keep avionics alive during starting.
The alternator is quite heavy. But has much better bearings than
lightweight alts.
The battery is bigger than I needed but is nice as will turn motor over
fast for starting even if partially discharged, and I needed weight in tail
so it may as well be useful weight.
Andrew


On Sat, 16 Nov. 2019, 7:01 am Stephen Izett stephen.izett@gmail.com, <
flyrotary@lancaironline.net> wrote:

> Hi Guys
>
> I=E2=80=99m reviewing our electrical system and thought as its a critical=
 system i
> should get the wisdom of what other decided as far as risk.
> If people have circuit diagrams that would help.
> I have an electronics background.
>
> My key questions are around:
>
> Battery/s (single/dual) If dual - how have you implemented?
> Alternator (Capacity to control - Over Voltage etc.)
> Switching (How you switch the electrons on/off - I recently had a Narva
> Ignition switch failure)
> Failure modes and emergency response plans
>
> Much appreciated.
>
> Steve Izett
> Glasair Super IIRG - In Phase #1 testing.
> Perth Western Australia
>
>
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>

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<div dir=3D"auto"><div>I wont give schematics as mine grew into a mess as I=
 built the plane and also needs cleaning up.<div dir=3D"auto">But as for po=
wer supply.</div><div dir=3D"auto">Main power is 80a alternator, modified t=
o external B&amp;C regulator.</div><div dir=3D"auto">Backup power is 40ah s=
tarting battery. Avionics buss has small agm battery connected through swit=
ch &amp; diode to keep avionics alive during starting.</div><div dir=3D"aut=
o">The alternator is quite heavy. But has much better bearings than lightwe=
ight alts.=C2=A0</div><div dir=3D"auto">The battery is bigger than I needed=
 but is nice as will turn motor over fast for starting even if partially di=
scharged, and I needed weight in tail so it may as well be useful weight.</=
div><div dir=3D"auto">Andrew</div><br><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Sat, 16 Nov. 2019, 7:01 am Stephen Izett=
 <a href=3D"mailto:stephen.izett@gmail.com">stephen.izett@gmail.com</a>, &l=
t;<a href=3D"mailto:flyrotary@lancaironline.net">flyrotary@lancaironline.ne=
t</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Guys<br>
<br>
I=E2=80=99m reviewing our electrical system and thought as its a critical s=
ystem i should get the wisdom of what other decided as far as risk.<br>
If people have circuit diagrams that would help.<br>
I have an electronics background.<br>
<br>
My key questions are around:<br>
<br>
Battery/s (single/dual) If dual - how have you implemented?<br>
Alternator (Capacity to control - Over Voltage etc.)<br>
Switching (How you switch the electrons on/off - I recently had a Narva Ign=
ition switch failure)<br>
Failure modes and emergency response plans<br>
<br>
Much appreciated.<br>
<br>
Steve Izett<br>
Glasair Super IIRG - In Phase #1 testing.<br>
Perth Western Australia<br>
<br>
<br>
<br>
<br>
<br>
--<br>
Homepage:=C2=A0 <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer nor=
eferrer" target=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:=C2=A0 =C2=A0<a href=3D"http://mail.lancaironline.net:81/=
lists/flyrotary/List.html" rel=3D"noreferrer noreferrer" target=3D"_blank">=
http://mail.lancaironline.net:81/lists/flyrotary/List.html</a><br>
</blockquote></div></div></div>

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