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Message-ID: <1b4b137c0710211116k214679d0ya2c249f0dc4de892@mail.gmail.com>
Date: Sun, 21 Oct 2007 14:16:59 -0400
From: "Tracy Crook" <tracy@rotaryaviation.com>
Sender: rwstracy@gmail.com
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] LS1 coils
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I think I noticed one of the D581 type have weak spark shortly before
complete failure.  I am still using three of the D581's just to proove to
myself that it was a heat problem that caused several failures before I put
a cooling plenum around them.

 I have heard no reports of the D580 type failing (even without a cooling
plenum) but I still recommend an enclosure with a supply of cool air to
them.  We are pushing them pretty hard in aircraft use.

Tracy


On 10/21/07, Al Gietzen <ALVentures@cox.net> wrote:
>
>  Has anyone noticed a "degradation" of spark strength as a failure mode of
> the LS1 coils?  I've assumed that a coil failure would most likely occur due
> to failure of a solid state component in the coils circuitry; resulting in
> no spark.
>
>
>
> Al
>

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<div>I think I noticed one of the D581 type have weak spark shortly before complete failure.&nbsp; I am still using three of the D581&#39;s just to proove to myself that it was a heat problem that caused several failures before I put a cooling plenum around them.&nbsp;
</div>
<div>&nbsp;</div>
<div>&nbsp;I have heard no reports of the D580 type failing (even without a cooling plenum) but I still recommend an enclosure with a supply of cool air to them.&nbsp; We are pushing them pretty hard in aircraft use.</div>
<div>&nbsp;</div>
<div>Tracy<br><br>&nbsp;</div>
<div><span class="gmail_quote">On 10/21/07, <b class="gmail_sendername">Al Gietzen</b> &lt;<a href="mailto:ALVentures@cox.net">ALVentures@cox.net</a>&gt; wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div lang="EN-US" vlink="purple" link="blue">
<div>
<p><font face="Verdana" size="2"><span style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana">Has anyone noticed a "degradation" of spark strength as a failure mode of the LS1 coils?&nbsp; I've assumed that a coil failure would most likely occur due to failure of a solid state component in the coils circuitry; resulting in no spark. 
</span></font></p>
<p><font face="Verdana" size="2"><span style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana">&nbsp;</span></font></p>
<p><font face="Verdana" size="2"><span style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana">Al</span></font></p></div></div></blockquote></div><br>

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