X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m18.mx.aol.com ([64.12.138.208] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 938390 for flyrotary@lancaironline.net; Tue, 10 May 2005 01:03:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.208; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m18.mx.aol.com (mail_out_v38_r1.7.) id q.142.44f3fc63 (3988) for ; Tue, 10 May 2005 01:02:55 -0400 (EDT) From: WRJJRS@aol.com Message-ID: <142.44f3fc63.2fb19a7f@aol.com> Date: Tue, 10 May 2005 01:02:55 EDT Subject: Re: [FlyRotary] Re: center rotor OFF To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1115701375" X-Mailer: 9.0 SE for Windows sub 5012 -------------------------------1115701375 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/9/2005 6:20:02 PM Pacific Standard Time, wschertz@ispwest.com writes: I read somewhere that they close the intake and exhaust valves, so the air in the combustion chamber is compressed, then releases some of its compression energy back to the piston to help reduce pumping losses. Bill Schertz KIS Cruiser # 4045 Bill, You have it correct. The explanation I got was most of the loss in compression is recovered in expansion. (rather than combustion) A compression release is not the answer as engine braking is caused by compression release. It is also noisy, the jake brake used on diesels is a compression release, though the diesel is louder due to it's much higher compression. Bill Jepson -------------------------------1115701375 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 5/9/2005 6:20:02 PM Pacific Standard Time,=20 wschertz@ispwest.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
I read somewhere that they close the intake and exhaust valves, so th= e=20 air in the combustion chamber is compressed, then releases some of its=20 compression energy back to the piston to help reduce pumping losses.
Bill Schertz
KIS Cruiser # 4045
Bill,
 You have it correct. The explanation I got was most of the loss i= n=20 compression is recovered in expansion. (rather than combustion)  A=20 compression release is not the answer as engine braking is caused by compres= sion=20 release. It is also noisy, the jake brake used on diesels is a compression=20 release, though the diesel is louder due to it's much higher compression.
Bill Jepson
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