X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m20.mx.aol.com ([64.12.137.1] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 931682 for flyrotary@lancaironline.net; Wed, 18 Jan 2006 14:27:46 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.1; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m20.mx.aol.com (mail_out_v38_r6.3.) id q.149.5495d823 (16035) for ; Wed, 18 Jan 2006 14:26:57 -0500 (EST) Received: from FWM-M20 (fwm-m20.webmail.aol.com [64.12.168.84]) by air-id10.mx.aol.com (v108_r1_b1.2) with ESMTP id MAILINID102-3ea343ce96811ec; Wed, 18 Jan 2006 14:26:57 -0500 Date: Wed, 18 Jan 2006 14:26:57 -0500 Message-Id: <8C7EA7C47E912E7-B18-15D8@FWM-M20.sysops.aol.com> From: wrjjrs@aol.com References: Received: from 66.127.99.234 by FWM-M20.sysops.aol.com (64.12.168.84) with HTTP (WebMailUI); Wed, 18 Jan 2006 14:26:57 -0500 X-MB-Message-Source: WebUI X-MB-Message-Type: User In-Reply-To: X-Mailer: AOL WebMail 15106 Subject: Re: [FlyRotary] Re: LS1 Coil Failures Content-Type: multipart/alternative; boundary="--------MailBlocks_8C7EA7C47E912E7_B18_15CA_FWM-M20.sysops.aol.com" MIME-Version: 1.0 To: flyrotary@lancaironline.net X-AOL-IP: 64.12.168.84 X-Spam-Flag: NO ----------MailBlocks_8C7EA7C47E912E7_B18_15CA_FWM-M20.sysops.aol.com Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mark, There may well be a duty cycle problem, but I doubt it. Older ignitions used= a single coil of similar type firing all 8 cylinders. I would be more likel= y to suggest it was a "bathtub failure curve" failure of the solid state "tr= igger" circuit. Bill Jepson =20 -----Original Message----- From: Mark R Steitle To: Rotary motors in aircraft Sent: Wed, 18 Jan 2006 10:51:47 -0600 Subject: [FlyRotary] Re: LS1 Coil Failures Sorry, that's what I get for doing "head math". Anyway, my point is still v= alid. It fires 8 times more often in the rotary than in the truck/auto. Co= uld the duty-cycle be the culprit? It would be interesting to see the specs= on these coils. =20 Mark S.=20 =20 =20 ----------MailBlocks_8C7EA7C47E912E7_B18_15CA_FWM-M20.sysops.aol.com Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Mark,

There may well be a duty cycle problem, but I doubt it. Older ignitions= used a single coil of similar type firing all 8 cylinders. I would be more=20= likely to suggest it was a "bathtub failure curve" failure of the solid stat= e "trigger" circuit.

Bill Jepson

-----Original Message-----
From: Mark R S= teitle <mark.steitle@austin.utexas.edu>
To: Rotary motors in aircra= ft <flyrotary@lancaironline.net>
Sent: Wed, 18 Jan 2006 10:51:47 -0= 600
Subject: [FlyRotary] Re: LS1 Coil Failures

Sorry, that's what I g= et for doing "head math". Anyway, my point is still valid. It fi= res 8 times more often in the rotary than in the truck/auto. Could the= duty-cycle be the culprit? It would be interesting to see the specs o= n these coils.

Mark S.

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