From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] AR2592 gap
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-2061183@logan.com>
Message-ID: <3ef03f92-ac00-9eb5-2ce4-81a9ce31c232@verizon.net>
Date: Sun, 28 May 2023 22:11:53 -0400
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Talked to Tracy.
He's looking for gap in the 0.03 to 0.035" range, but just installed 
BR10EIX which I think comes with 0.048" (approx) from manufacturer, I 
think. He just eyed the gaps in the new plugs and called it close enough.

He also ran the stock RX-7 plugs in his Renesis until he ran out of his 
stock of them.

So it doesn't seem all that critical.

Alter grinding the rotor housings to make room for socket over the 
AR2502 plugs, I did a short flight (16 mins) today with the old cleaned 
trailing plugs and two new AR2592 plugs gapped to 0.030". Seems I gained 
at least 100 RPM on takeoff and climbout.

BTW, measured gap on four AR2592 new plugs and it varied from 0.024 to 
0.030. Supposed to be 0.025" from manufacturer. Moral of story is you 
need to check/set gap on new plugs (where possible).

Probably all common knowledge to you all but new data to me.

Finn


On 5/25/2023 9:13 AM, Finn Lassen finn.lassen@verizon.net wrote:
> For those of you who use the AR2592 spark plug in the Renesis, do you 
> use the 0.6mm gap the plug comes with? I bought 8 of them some years ago.
>
> I've been using the stock plugs (RE7A and RE9B) for maybe 100 hours by 
> now. Experienced a brief 200 RPM drop on last takeoff. Wondering if 
> it's time to change plugs. Or re-gap the stock plugs to what?
>
> What can I learn by looking at plugs?
>
> Best way to clean them?
>
> Finn
>
>
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html


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    <div class="moz-cite-prefix">Talked to Tracy.<br>
      He's looking for gap in the 0.03 to 0.035" range, but just
      installed BR10EIX which I think comes with 0.048" (approx) from
      manufacturer, I think. He just eyed the gaps in the new plugs and
      called it close enough.<br>
      <br>
      He also ran the stock RX-7 plugs in his Renesis until he ran out
      of his stock of them.<br>
      <br>
      So it doesn't seem all that critical.<br>
      <br>
      Alter grinding the rotor housings to make room for socket over the
      AR2502 plugs, I did a short flight (16 mins) today with the old
      cleaned trailing plugs and two new AR2592 plugs gapped to 0.030".
      Seems I gained at least 100 RPM on takeoff and climbout.<br>
      <br>
      BTW, measured gap on four AR2592 new plugs and it varied from
      0.024 to 0.030. Supposed to be 0.025" from manufacturer. Moral of
      story is you need to check/set gap on new plugs (where possible).<br>
      <br>
      Probably all common knowledge to you all but new data to me.<br>
      <br>
      Finn<br>
      <br>
      <br>
      On 5/25/2023 9:13 AM, Finn Lassen <a class="moz-txt-link-abbreviated" href="mailto:finn.lassen@verizon.net">finn.lassen@verizon.net</a> wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-2061183@logan.com">For those
      of you who use the AR2592 spark plug in the Renesis, do you use
      the 0.6mm gap the plug comes with? I bought 8 of them some years
      ago.
      <br>
      <br>
      I've been using the stock plugs (RE7A and RE9B) for maybe 100
      hours by now. Experienced a brief 200 RPM drop on last takeoff.
      Wondering if it's time to change plugs. Or re-gap the stock plugs
      to what?
      <br>
      <br>
      What can I learn by looking at plugs?
      <br>
      <br>
      Best way to clean them?
      <br>
      <br>
      Finn
      <br>
      <br>
      <br>
      <br>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">--
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