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Date: Sat, 21 Nov 2009 10:51:28 -0800 (PST)
From: James Maher <delta11xd@att.net>
Subject: Re: [FlyRotary] Re: Need a sanity check
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-3984776@logan.com>
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Steve,
From the testing you have done it sounds like the starter is causing a volt=
age drop
sufficient to render the rest of the electrical system to become marginally=
 operative.
I had a similar issue when I moved the battery from close to the engine to =
further away for
weight and balance reasons.
Like you, I have a two battery system.
An essential bus for all the engine related electronics and the main bus fo=
r everything else.
I moved the starter to the main bus which is isolated from the essential bu=
s until the engine starts. Then the two buses are connected via a contactor=
 so there is no voltage loss.
This solved the problem of the starter dragging down the electronics voltag=
e.
Hope you can solve your problem the same way.
=A0
Jim

--- On Sat, 11/21/09, Steve Brooks <cozy4pilot@gmail.com> wrote:


From: Steve Brooks <cozy4pilot@gmail.com>
Subject: [FlyRotary] Re: Need a sanity check
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date: Saturday, November 21, 2009, 12:00 PM


Bobby J. Hughes wrote:
> Steve,
>
> I removed the battery cable running to the starter, and using a spare
> battery, and a jumper cable for the ground, I cranked the starter with
> this battery, which was isolated from the airplanes electrical system.
> It had good spark on both rotors .... yeah !!!
snip
=A0
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;"><DIV>Steve,</DIV>
<DIV>From the testing you have done it sounds like the starter is causing a=
 voltage drop</DIV>
<DIV>sufficient to render the rest of the electrical system to become margi=
nally operative.</DIV>
<DIV>I had a similar issue when I moved the battery from close to the engin=
e to further away for</DIV>
<DIV>weight and balance reasons.</DIV>
<DIV>Like you, I have a two battery system.</DIV>
<DIV>An essential bus for all the engine related electronics and the main b=
us for everything else.</DIV>
<DIV>I moved the starter to the main bus which is isolated from the essenti=
al bus until the engine starts. Then the two buses are connected via a cont=
actor so there is no voltage loss.</DIV>
<DIV>This solved the problem of the starter dragging down the electronics v=
oltage.</DIV>
<DIV>Hope you can solve your problem the same way.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jim<BR><BR>--- On <B>Sat, 11/21/09, Steve Brooks <I>&lt;cozy4pilot@gma=
il.com&gt;</I></B> wrote:<BR></DIV>
<BLOCKQUOTE style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(=
16,16,255) 2px solid"><BR>From: Steve Brooks &lt;cozy4pilot@gmail.com&gt;<B=
R>Subject: [FlyRotary] Re: Need a sanity check<BR>To: "Rotary motors in air=
craft" &lt;flyrotary@lancaironline.net&gt;<BR>Date: Saturday, November 21, =
2009, 12:00 PM<BR><BR>
<DIV class=3DplainMail>Bobby J. Hughes wrote:<BR>&gt; Steve,<BR>&gt;<BR>&gt=
; I removed the battery cable running to the starter, and using a spare<BR>=
&gt; battery, and a jumper cable for the ground, I cranked the starter with=
<BR>&gt; this battery, which was isolated from the airplanes electrical sys=
tem.<BR>&gt; It had good spark on both rotors .... yeah !!!<BR>snip</DIV>
<DIV class=3DplainMail>&nbsp;</DIV></BLOCKQUOTE></td></tr></table>
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