X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([207.115.11.54] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3749721 for flyrotary@lancaironline.net; Wed, 08 Jul 2009 15:27:58 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.54; envelope-from=keltro@att.net DKIM-Signature: v=1; q=dns/txt; d=att.net; s=dkim01; i=keltro@att.net; a=rsa-sha256; c=relaxed/relaxed; t=1247081278; h=Content-Type: MIME-Version:In-Reply-To:Message-Id:Date:Subject:To:From; bh=m50KPG guTJkTAhLFtuyDz6Bw/sM3JoAVJmI62pKLk4s=; b=NhWyCNwwzeLU1mfu4mW7x21U8 1YiRqTFZIiQxff1x2eGrNF5wWxo5NTagqgYRkJni4AWiMondaSFATH7qTSwhA== Received: from fwebmail09.isp.att.net ([207.115.11.159]) by isp.att.net (frfwmhc04) with SMTP id <20090708192721H0400hfjfje>; Wed, 8 Jul 2009 19:27:21 +0000 X-Originating-IP: [207.115.11.159] Received: from [64.250.221.104] by fwebmail09.isp.att.net; Wed, 08 Jul 2009 19:27:21 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: SAG- Spark plugs 2592 or 2692? Date: Wed, 08 Jul 2009 19:27:21 +0000 Message-Id: <070820091927.21644.4A54F319000813AD0000548C22218675169B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 2 2009) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_21644_1247081241_0" --NextPart_Webmail_9m3u9jl4l_21644_1247081241_0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Jeff and All, I believe the mystery is solved...............Apparently "AR2692" is= a typo error and "AR2592" is correct..............Check out the link below............Fu= ll of info.....=20 http://www.autolite.com/pdf/Autolite_HP_Apps.pdf Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from "Kelly Troyer" : -----= ---------=20 Jeff, I have never found a trace of a "AR2692"............Lynn which is correct= ??................... -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from Jeff Whaley : --= ------------=20 Lynn=E2=80=99s email referenced 2 part numbers =E2=80=A6 Poor folks race wi= th Autolight AR2692 and =E2=80=A6 In the picture, left to right is the Auto= light AR2592. So which number is it correct? 2592 or 2692? Jeff =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Kelly Troyer Sent: Wednesday, July 08, 2009 2:35 PM To: Rotary motors in aircraft Subject: [FlyRotary] SAG- Spark plugs =20 Lynn and Group, =20 I checked my local "Auto Zone" and they claimed to be unable to ge= t the "AutoLite" AR2592 sparkplug...............Checked "Rock Auto" (Link below) and they ha= ve them in packs of 4 for $2.69 (each plug)...........Ordered 8 of them for $21.52 + $= 5.47 shipping but "AutoLite" has a rebate offer of $0.50 per plug for up to 16 plugs unti= l Nov. 30,2009 for copper core plugs (rebate link below).............To find the sparkplug= do a part number search (AR2592) , Add the manufacturer (AutoLite) , Then use "all" for the = part group because if you use "Ignition" and "Sparkplug" for part type it will say "No= part found".... =20 FWIW=20 =20 =20 http://www.rockauto.com/catalog/raframecatalog.php?a=3DG-Store =20 http://www.autolite.com/rebate/pdf/spark-plug-09.pdf -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 =20 -------------- Original message from Lynn Hanover : --= ------------=20 In a message dated 7/7/2009 3:22:56 P.M. Pacific Daylight Time, bbradburry@= bellsouth.net writes: Steve, I hope Lynn chimes in here. He has seen a lot of plugs under a lot of conditions. They look pitted to me. There seems nothing wrong with your conditions. The only thing on the list would be too lean.?? Someone is out there writing up a great response right now! :>) Bill B=20 That plug has been too hot.=20 =20 Stock Mazda plugs are rather cold in heat range by way of the guards around= the shell. The electrode runs a bit hotter than normal. Plug heat ranges a= re determined by how far down the shell the porcelain touches. The longer t= he heat path, the hotter the plug.=20 =20 Using car plugs in the aircraft application seems to be asking for trouble.= In the car on the freeway you use 2,600 RPM and 1/2 throttle, maybe 24 to = 28 HP. Not much of a challenge for a spark plug. But there is the=20 driver who will jump into his 95 twin turbo in LA and run out to LasVegas a= t full tilt and expect to still have an engine when he gets there. And usua= lly he does. So, if I was to use a street plug in an aircraft, I would use= the 93-95 twin turbo plug, whatever that is. =20 The aircraft application, less the 100LL fuel problem, is clearly a cold ra= cing plug with a conventional gap or close to it.=20 =20 Years ago when we started racing rotaries, Champion said to use the N-57G F= ine wire center with gold paladium plating and a conventional ground strap.= About 20% of the center wire is exposed in an end view. =20 The N-57G and similar are discontinued and the N-82 series replaced it. The= shell is thinner and the porcelain is wider. Same fine wire center, no gol= d anything. 20% of the wire exposed in an end view.=20 Both worked fine even with points and a Kettering coil. =20 Poor folks race with Autolight AR2692 end style and small porcelain just li= ke the N-57G. Full size center wire, conventional strap, but 100% of the ce= nter wire is exposed in an end view. Actually used by NASCAR and the local = circle track people, and stocked by Autozone and others. About $5.00 a box = of 4. They work fine. I raced them one weekend, no problems, but we were ge= tting the NGK plugs for free so I stuck with them.=20 =20 The NGKR6725-115 stamped on the body actually means that the heat range is = 11.5 not 115. $25.00 each. 50% of the center wire exposed in an end view. Free for some Rotary engined= competitors. Retracted gap (the whole thing is inside the shell. Fine wire= center and fine wire ground strap. Ice cold. Long body so it is easy to in= stall and remove in the rotary.=20 =20 I grind off those eyebrow things above the plug holes so I can use any plug= I like. And any 5/8" plug just goes in so easy. Most heat ranges are avail= able in the 5/8" shells.=20 =20 Rotaries do not like high heat range plugs. The housings crack across the l= eading plug hole. Over time a complete set of radial cracks form.=20 =20 In the picture, left to right is the Autolight AR2592, Champion N-82, NGK R= 6725-115, and Champion=20 N-57G.=20 =20 Lynn E. Hanover =20 --NextPart_Webmail_9m3u9jl4l_21644_1247081241_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_21644_1247081241_1" --NextPart_Webmail_9m3u9jl4l_21644_1247081241_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Jeff and All,
 
       I believe the mystery is solved..= .............Apparently "AR2692" is a typo error
and "AR2592" is correct..............Check out the link below.........= ...Full of info..... 
 
 

Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2= /EM2
"Mistral"_Backplate/Oil Manifold



 
-------------- Original message from "Kelly Troyer" <kelt= ro@att.net>: --------------

Jeff,
  I have never found a trace of a "AR2692"............Lynn which = is correct ??...................
--
Kelly Troyer
"Dyke Delta"_1= 3B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifol= d



 
-------------- Original message from Jeff Whaley <jwhaley= @datacast.com>: --------------

Lynn=E2=80=99s email referenced 2 part numbe= rs =E2=80=A6 Poor folks race with Autolight AR2692 and =E2=80=A6 In = the picture, left to right is the Autolight AR2592.

So which number is it c= orrect? 2592 or 2692?

Jeff<= o:p>

 

From: Rotary motors in aircraft [mailto:flyrotary@lanc= aironline.net] On Behalf Of Kelly Troyer
Sent: Wednesday, = July 08, 2009 2:35 PM
To: Rotary motors in aircraft
Subject= : [FlyRotary] SAG- Spark plugs

 

Lynn and Group,

 

         I che= cked my local "Auto Zone" and they claimed to be unable to get the "AutoLit= e"

AR2592 sparkplug...............Checked "Rock Auto" (Li= nk below) and they have them in

packs of 4 for $2.69 (each plug)...........Ordered 8 o= f them for $21.52 + $5.47 shipping

but "AutoLite" has a rebate offer of $0.50 per plug fo= r up to 16 plugs until Nov. 30,2009

for copper core plugs (rebate link below).............= To find the sparkplug do a part number

search (AR2592) , Add the manufacturer (AutoLite)= , Then use "all" for the part group

because if you use "Ignition" and "Sparkplug" for part= type it will say "No part found"....

 

FWIW 

 

 

 

--
Kelly Troyer
"= Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplat= e/Oil Manifold


 

-------------- Original = message from Lynn Hanover <lehanover@gmail.com>: -------------- =

In a message dated 7/7/2009 3:22:56 P.M. Pacific Dayli= ght Time, bbradburry@bellsouth.= net writes:

Steve,
I hope Lynn chimes in here.  He h= as seen a lot of plugs under a lot of
conditions.  They look pitted= to me.  There seems nothing wrong with your
conditions.  The = only thing on the list would be too lean.??
Someone is out there writing= up a great response right now!  :>)
Bill B

That plug has been too hot.

 

Stock Mazda plugs are rather cold in heat range by way= of the guards around the shell. The electrode runs a bit hotter than norma= l. Plug heat ranges are determined by how far down the shell the porcelain = touches. The longer the heat path, the hotter the plug.

 

Using car plugs in the aircraft application seems to b= e asking for trouble. In the car on the freeway you use 2,600 RPM and 1/2 t= hrottle, maybe 24 to 28 HP. Not much of a challenge for a spark plug. = But there is the

driver who will jump into his 95 twin turbo in LA and = run out to LasVegas at full tilt and expect to still have an engine wh= en he gets there. And usually he does.  So, if I was to use a street p= lug in an aircraft, I would use the 93-95 twin turbo plug, whatever that is= .

 

The aircraft application, less the 100LL fuel problem,= is clearly a cold racing plug with a conventional gap or close to it.

 

Years ago when we started racing rotaries, Champion sa= id to use the N-57G Fine wire center with gold paladium plating and a conve= ntional ground strap. About 20% of the center wire is exposed in an end vie= w.

 

The N-57G and similar are discontinued and the N-82 se= ries replaced it. The shell is thinner and the porcelain is wider. Same fin= e wire center, no gold anything. 20% of the wire exposed in an end view.

Both worked fine even with points and a Kettering coil= .

 

Poor folks race with Autolight AR2692 end style and sm= all porcelain just like the N-57G. Full size center wire, conventional stra= p, but 100% of the center wire is exposed in an end view. Actually used by = NASCAR and the local circle track people, and stocked by Autozone and other= s. About $5.00 a box of 4. They work fine. I raced them one weekend, no pro= blems, but we were getting the NGK plugs for free so I stuck with them.

 

The NGKR6725-115 stamped on the body actually means th= at the heat range is 11.5 not 115. $25.00 each.

50% of the center wire exposed in an end view. Free fo= r some Rotary engined competitors. Retracted gap (the whole thing is inside= the shell. Fine wire center and fine wire ground strap. Ice cold. Long bod= y so it is easy to install and remove in the rotary.

 

I grind off those eyebrow things above the plug holes = so I can use any plug I like. And any 5/8" plug just goes in so easy. Most = heat ranges are available in the 5/8" shells.

 

Rotaries do not like high heat range plugs. The housin= gs crack across the leading plug hole. Over time a complete set of radial c= racks form.

 

In the picture, left to right is the Autolight AR2592,= Champion N-82, NGK R6725-115, and Champion

N-57G. 

 

Lynn E. Hanover

 

<= /DIV>
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