From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] AR2592 gap
Date: Mon, 29 May 2023 10:28:34 +0800
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Finn

Thanks for the information re plugs and gaps.
How did you end up grinding the housings and how much did you remove?
I=E2=80=99ve ground a few plug sockets down but they are so thin they =
break.

Cheers

Steve Izett

> On 29 May 2023, at 10:11 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>=20
> 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.
>=20
> He also ran the stock RX-7 plugs in his Renesis until he ran out of =
his stock of them.
>=20
> So it doesn't seem all that critical.
>=20
> 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.
>=20
> 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).
>=20
> Probably all common knowledge to you all but new data to me.
>=20
> Finn
>=20
>=20
> On 5/25/2023 9:13 AM, Finn Lassen finn.lassen@verizon.net =
<mailto: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.=20
>>=20
>> 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?=20
>>=20
>> What can I learn by looking at plugs?=20
>>=20
>> Best way to clean them?=20
>>=20
>> Finn=20
>>=20
>>=20
>>=20
>>=20
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>=20


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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">Hi =
Finn<div><br></div><div>Thanks for the information re plugs and =
gaps.</div><div>How did you end up grinding the housings and how much =
did you remove?</div><div>I=E2=80=99ve ground a few plug sockets down =
but they are so thin they =
break.</div><div><br></div><div>Cheers</div><div><br></div><div>Steve =
Izett</div><div><div><br><blockquote type=3D"cite"><div>On 29 May 2023, =
at 10:11 am, Finn Lassen finn.lassen@verizon.net =
&lt;flyrotary@lancaironline.net&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div>
 =20
    <meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8">
 =20
  <div text=3D"#000000" bgcolor=3D"#FFFFFF">
    <div class=3D"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=3D"moz-txt-link-abbreviated" =
href=3D"mailto:finn.lassen@verizon.net">finn.lassen@verizon.net</a> =
wrote:<br>
    </div>
    <blockquote type=3D"cite" cite=3D"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=3D"mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap=3D"">--
Homepage:  <a class=3D"moz-txt-link-freetext" =
href=3D"http://www.flyrotary.com/">http://www.flyrotary.com/</a>
Archive and UnSub:   <a class=3D"moz-txt-link-freetext" =
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</pre>
    </blockquote><p><br>
    </p>
  </div>

</div></blockquote></div><br></div></body></html>=

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