X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m25.mx.aol.com ([64.12.137.6] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 883496 for flyrotary@lancaironline.net; Thu, 15 Dec 2005 12:31:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.6; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m25.mx.aol.com (mail_out_v38_r6.3.) id q.2be.18fd752 (15863) for ; Thu, 15 Dec 2005 12:30:29 -0500 (EST) Received: from FWM-D25 (fwm-d25.webmail.aol.com [205.188.162.1]) by air-id06.mx.aol.com (v108.32) with ESMTP id MAILINID62-3df743a1a8341f5; Thu, 15 Dec 2005 12:30:29 -0500 Date: Thu, 15 Dec 2005 12:30:29 -0500 Message-Id: <8C7CFB460981C98-A34-15342@FWM-D25.sysops.aol.com> From: wrjjrs@aol.com References: Received: from 66.127.99.234 by FWM-D25.sysops.aol.com (205.188.162.1) with HTTP (WebMailUI); Thu, 15 Dec 2005 12:30:22 -0500 X-MB-Message-Source: WebUI X-MB-Message-Type: User In-Reply-To: X-Mailer: AOL WebMail 15106 Subject: Re: [FlyRotary] Re: MSD ignition Content-Type: multipart/alternative; boundary="--------MailBlocks_8C7CFB45CA2D880_A34_14745_FWM-D25.sysops.aol.com" MIME-Version: 1.0 To: flyrotary@lancaironline.net X-AOL-IP: 205.188.162.1 X-Spam-Flag: NO ----------MailBlocks_8C7CFB45CA2D880_A34_14745_FWM-D25.sysops.aol.com Content-Type: text/plain; charset="us-ascii" Dale, The snippet below seems to indicate "at crank (excentric shaft) speed". I also don't know how to set the timing if not set to the e-shaft. You certainly can't drive a mag off a 2.85:1 anything as the mag would need an exact 1:1 or possibly 3:1 gearing/timing to the excentric shaft. Bill Jepson > ... I would rig up a drive for any real aircraft Mag and grind off two of the points cam lobes and spin the Mag at crank speed with a little toothed belt. ... So 8000 crank RPM / 2.85 = 2807 Prop RPM, which should be within the capabilities of even an aircraft mag. ??? Dale R. COZY MkIV-R13B #1254 Ch's 4, 5, 9, 16, & 23 in-progress -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ----------MailBlocks_8C7CFB45CA2D880_A34_14745_FWM-D25.sysops.aol.com Content-Type: text/html; charset="us-ascii"

Dale,

The snippet below seems to indicate "at crank (excentric shaft) speed". I also don't know how to set the timing if not set to the e-shaft. You certainly can't drive a mag off a 2.85:1 anything as the mag would need an exact 1:1 or possibly 3:1 gearing/timing to the excentric shaft.

Bill Jepson

> ... I would rig up a drive for any real aircraft Mag and grind off two of the points cam lobes and spin the Mag at crank speed with a little toothed belt. ... So 8000 crank RPM / 2.85 = 2807 Prop RPM, which should be within the capabilities of even an aircraft mag. ??? Dale R. COZY MkIV-R13B #1254 Ch's 4, 5, 9, 16, & 23 in-progress -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/

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