X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.1.2) with ESMTP id 1595387 for flyrotary@lancaironline.net; Wed, 22 Nov 2006 21:43:21 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-098-162.carolina.res.rr.com [24.74.98.162]) by ms-smtp-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id kAN2gRVV016945 for ; Wed, 22 Nov 2006 21:43:01 -0500 (EST) Message-ID: <000901c70ea9$038a36c0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Spark Plug Fouling and Temperature Date: Wed, 22 Nov 2006 21:42:26 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C70E7F.1A5E4690" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C70E7F.1A5E4690 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, Lynn 25 hours means I change spark plugs about 2 times a year based on the = flying I do - so certainly not unacceptable. But, naturally 250 hours = would be better {:>). $7.00 a box is certainly much cheaper than the = stock rotary plugs which are becoming non-stocked in auto stores around = here - have to special order. =20 Don't want radial cracks (or any other kind), so perhaps will try the = autolite AR2592. Ed ----- Original Message -----=20 From: Lehanover@aol.com=20 To: Rotary motors in aircraft=20 Sent: Wednesday, November 22, 2006 9:04 PM Subject: [FlyRotary] Re: Spark Plug Fouling and Temperature In a message dated 11/22/2006 8:56:30 P.M. Eastern Standard Time, = eanderson@carolina.rr.com writes: Its interesting, we I use 100LL I usually get 25 hours on a set of = plugs. I wonder what factors might make the difference between your = time interval and mine - "Plugs Up"?. I have not run across any chart = that indicated anything other than a plug digit which indicated a = "hotter" or a "colder version". I think I may try hotter plugs and see = if they make any difference. Ed=20 Look at an old rotor housing to see if there are tiny radial cracks = around the trailing hole. This indicates an overheated spark plug.=20 That 25 hours seems acceptable to me. I would try Autolite AR2592. = Very cold heat range, good for racing. Thicker ground electrode. Order = through Autozone for about $7.00 a box of 4. ------=_NextPart_000_0006_01C70E7F.1A5E4690 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Lynn
 
25 hours means I change spark plugs about 2 times a = year based=20 on the flying I do - so certainly not unacceptable.  But, naturally = 250=20 hours would be better {:>). $7.00 a box is certainly much cheaper = than the=20 stock rotary plugs  which are becoming non-stocked in auto stores = around=20 here - have to special order. 
 
Don't want radial cracks (or any other kind), so = perhaps will=20 try the autolite AR2592.
 
Ed
----- Original Message -----
From:=20 Lehanover@aol.com
Sent: Wednesday, November 22, = 2006 9:04=20 PM
Subject: [FlyRotary] Re: Spark = Plug=20 Fouling and Temperature

In a message dated 11/22/2006 8:56:30 P.M. Eastern Standard Time, = eanderson@carolina.rr.com=20 writes:
Its interesting, we I use 100LL I usually = get 25 hours=20 on a set of plugs.  I wonder what factors might make the = difference=20 between your time interval and mine - "Plugs Up"?.  I have = not run=20 across any chart that indicated anything other than a plug digit = which=20 indicated a "hotter" or a "colder version".  I think I may = try =20 hotter plugs and see if they make any difference.
 
Ed 
Look at an old rotor housing to see if there are tiny radial = cracks=20 around the trailing hole.
This indicates an overheated spark plug.
 
That 25 hours seems acceptable to me. I would try Autolite = AR2592. Very=20 cold heat range, good for racing. Thicker ground electrode. Order = through=20 Autozone for about $7.00 a box of = 4.
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