X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2120361 for flyrotary@lancaironline.net; Wed, 20 Jun 2007 03:00:06 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m28.mx.aol.com (mail_out_v38_r9.2.) id q.c68.155c3ac3 (42805) for ; Wed, 20 Jun 2007 02:59:10 -0400 (EDT) From: WRJJRS@aol.com Message-ID: Date: Wed, 20 Jun 2007 02:59:10 EDT Subject: Re: [FlyRotary] Re: Different Rotary Port configurations To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1182322750" X-Mailer: 9.0 SE for Windows sub 5042 X-Spam-Flag: NO -------------------------------1182322750 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 6/19/2007 6:52:28 PM Pacific Standard Time, Lehanover@aol.com writes: There is very little of the cylinder left with no port of some kind in those engines. Normal full power is 5,500 RPM. Every stroke is a power stroke. I don't think a bridge in the rotor housing would be in more danger than the rather brittle cast iron bridge in a bridge ported side port engine. Lynn E. Hanover Lynn, Sometime I'll show you one of the Yamaha GP 500cc road race cylinders I have. I wondered how they could have compression at first glance since there are SO MANY HOLES in that cylinder. Highest specific output of any normally aspirated engine on the planet. Hondas 500 was the most powerful with Yamaha close behind. Mick Doohan, was once asked how much power his Honda made. He replied, "My contract with Honda prohibits my telling. But I'll say that if they made 1 liter engine it would make over 400 HP!" No bridges in any of those ports. If you run the 3rd gen 2mm seals you shouldn't need a bridge. My concern would be if the bridge caused a wear pattern that might cause a stress riser right in the middle of the seal. This would be bad. Doesn't translate exactly to a piston ring. Bill Jepson ************************************** See what's free at http://www.aol.com. -------------------------------1182322750 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 6/19/2007 6:52:28 PM Pacific Standard Time,=20 Lehanover@aol.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D3>

There is very little of the cylinder left with no port of some kind i= n=20 those engines. Normal full power is 5,500 RPM.

Every stroke is a power stroke.

I don't think a bridge in the rotor housing would be in more danger t= han=20 the rather brittle cast iron bridge in a bridge ported side port engine.=20

Lynn E. Hanover

Lynn,

Sometime I'll show you one of the Yamaha GP 500cc road rac= e=20 cylinders I have. I wondered how they could have compression at first glance= =20 since there are SO MANY HOLES in that cylinder. Highest specific output of a= ny=20 normally aspirated engine on the planet. Hondas 500 was the most powerful wi= th=20 Yamaha close behind. Mick Doohan, was once asked how much power his Honda ma= de.=20 He replied, "My contract with Honda prohibits my telling. But I'll say that=20= if=20 they made 1 liter engine it would make over 400 HP!" No bridges in any of th= ose=20 ports.

If you run the 3rd gen 2mm seals you shouldn't need a bridge= . My=20 concern would be if the bridge caused a wear pattern that might cause a stre= ss=20 riser right in the middle of the seal. This would be bad. Doesn't translate=20 exactly to a piston ring.

Bill Jepson

See what'= s free at AOL.co= m.

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