Received-SPF: none
 receiver=logan.com; client-ip=68.230.241.42; envelope-from=dale.r@cox.net
From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] MSD ignition
Date: Thu, 15 Dec 2005 11:24:54 -0500
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Message-Id: <20051215162342.MAHQ26964.fed1rmmtao08.cox.net@[172.18.180.8]>

Bill Jepson < wrjjrs@aol.com > wrote:

> Guys,  DO NOT use a 4 cylinder AIRCRAFT mag for any high RPM service. Some years ago motorcycle guys tried just that at Bonneville. They figured that the mag didn't need an eletrical system so it would, "Be lighter, faster, more powerful, insert your favorite adjective." The magnets in the MAGneto were not phased or designed  for 8K rpm ...

   Maybe I misunderstood, but I thought Lynn was recommending 
connecting the mag to the eccentric shaft (prop RPM):

> ... 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