X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nschwmtas03p.mx.bigpond.com ([61.9.189.143] verified) by logan.com (CommuniGate Pro SMTP 6.0c2) with ESMTP id 5802096 for flyrotary@lancaironline.net; Tue, 09 Oct 2012 01:40:17 -0400 Received-SPF: pass receiver=logan.com; client-ip=61.9.189.143; envelope-from=neil.unger@bigpond.com Received: from nschwcmgw07p ([61.9.190.167]) by nschwmtas03p.mx.bigpond.com with ESMTP id <20121009053929.SJXH11739.nschwmtas03p.mx.bigpond.com@nschwcmgw07p> for ; Tue, 9 Oct 2012 05:39:29 +0000 Received: from UserPC ([121.213.166.196]) by nschwcmgw07p with BigPond Outbound id 8tfT1k00D4EaPKM01tfTy3; Tue, 09 Oct 2012 05:39:29 +0000 X-Authority-Analysis: v=2.0 cv=apgw+FlV c=1 sm=1 a=fIaa1G1FRwvl4JyRhwTkmA==:17 a=JDadKst33uMA:10 a=1IlZJK9HAAAA:8 a=8xoUMB4lCmYA:10 a=3oc9M9_CAAAA:8 a=HZJGGiqLAAAA:8 a=CZ6vwoToFg3yDziVK4UA:9 a=wPNLvfGTeEIA:10 a=U8Ie8EnqySEA:10 a=HeoGohOdMD0A:10 a=Ia-xEzejAAAA:8 a=4PR2P7QzAAAA:8 a=wTpqqjDHuR5TtoHA7-oA:9 a=_W_S_7VecoQA:10 a=EzXvWhQp4_cA:10 a=djSSOgbfo6cA:10 a=mYEh1HeVKj2jzZ41:21 a=fIaa1G1FRwvl4JyRhwTkmA==:117 Message-ID: <79F14F96308A424E9C3B6B9FF770E6BE@UserPC> From: "Neil Unger" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Heat ranges Date: Tue, 9 Oct 2012 16:39:22 +1100 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01CDA63C.A2C3C540" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_000B_01CDA63C.A2C3C540 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Could someone inform this ignorant peasant as to just what SAG is = actually. I can only gather it is something nasty. I am more at home = with diesels. Neil. From: Lehanover@aol.com=20 Sent: Tuesday, October 09, 2012 3:39 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Heat ranges =20 I hate to keep beating this drum, but if you can walk into an Autozone = and buy it, you shouldn't.=20 The heat range is too high. Street plugs have nose temps high enough to = keep crap burned off at idle speed and 2,000 RPM light throttle. Once = you are at WOT for more than a few minutes that street plug is too hot. = You get cement boil around the center post. You manufacture a glow plug = and loose control of ignition advance.=20 The NGK dash 10s are closer to ideal. the dash 11.5 is what racers use. = Crosses to the dash 10s are also used in racing. Cheaper racers use = Autolite AR2592. Special order from your friendly parts house. The last = ones I bought were $7.00 for 4 plugs. Next day delivery. If you live = near a circle track they may stock a few boxes. Air cooled dirt bikes = use similar heat ranges.=20 Use inductive plug wires to kill off radio noise. Keep plug wires as = short as is possible. Plug wires must touch nothing that is grounded. Lynn E. Hanover Incinerating rotary engines since 1980.=20 In a message dated 10/8/2012 10:26:43 A.M. Eastern Daylight Time, = echristley@att.net writes: David, Thank you for the compliment. I have installed a set of the -10 spark plugs and at this point they = are long past the time where the stock plugs normally needed to be = replaced. How long they will continue to work is unknown, but at least = that one data point is consistent with the study and encouraging. ------=_NextPart_000_000B_01CDA63C.A2C3C540 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Could someone inform this ignorant peasant as to just what SAG is = actually.=20 I can only gather it is something nasty. I am more at home with = diesels. =20 Neil.
 
Sent: Tuesday, October 09, 2012 3:39 PM
Subject: [FlyRotary] Heat ranges
 
 =20
I hate to keep beating this drum, but if you can walk into an = Autozone and=20 buy it, you shouldn't.
The heat range is too high. Street plugs have nose temps high = enough to=20 keep crap burned off at idle speed and 2,000 RPM light throttle. Once = you are at=20 WOT for more than a few minutes that street plug is too hot. You get = cement boil=20 around the center post. You manufacture a glow plug and loose control of = ignition advance.
 
The NGK dash 10s are closer to ideal. the dash 11.5 is what racers = use.=20 Crosses to the dash 10s are also used in racing. Cheaper racers use = Autolite=20 AR2592. Special order from your friendly parts house. The last ones I = bought=20 were $7.00 for 4 plugs. Next day delivery. If you live near a circle = track they=20 may stock a few boxes. Air cooled dirt bikes use similar heat ranges. =
 
Use inductive plug wires to kill off radio noise. Keep plug wires = as short=20 as is possible. Plug wires must touch nothing that is grounded.
 
Lynn E. Hanover
Incinerating rotary
engines since 1980.
 
In a message dated 10/8/2012 10:26:43 A.M. Eastern Daylight Time,=20 echristley@att.net writes:

David,

Thank you for the compliment.

I have installed a set of the -10 spark plugs and at this point = they are=20 long past the time where the stock plugs normally needed to be = replaced. How=20 long they will continue to work is unknown, but at least that one = data point=20 is consistent with the study and=20 encouraging.


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