X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ispmxmta06-srv.alltel.net ([166.102.165.167] verified) by logan.com (CommuniGate Pro SMTP 5.0c5) with ESMTP id 771570 for flyrotary@lancaironline.net; Mon, 17 Oct 2005 21:05:32 -0400 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.167; envelope-from=montyr2157@alltel.net Received: from Thorstwin ([4.89.249.208]) by ispmxmta06-srv.alltel.net with SMTP id <20051018010447.NFEV12191.ispmxmta06-srv.alltel.net@Thorstwin> for ; Mon, 17 Oct 2005 20:04:47 -0500 Message-ID: <000501c5d37f$eeb517c0$d0f95904@Thorstwin> From: "Monty Roberts" To: Subject: flyrotary Displacement Date: Mon, 17 Oct 2005 20:04:45 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0002_01C5D356.053A9260" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0002_01C5D356.053A9260 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Actually Ken, that is the only time it matters is when comparing work. = Work is defined as the amount of energy extracted from the working fluid = per unit time. To figure out what this is you must look at the full = cycle and how many of them occur per unit time. Otherwise the comparison = is meaningless. I promise----follow the fluid. Ignore the hardware. = Crank shaft degrees are meaningless. Like I said measure the = displacement of your 302 via the cam drive---it becomes a 604 or if you = prefer a 2 cycle 302. 2 cycle, four cycle, number of equivalent = cylinders and numbers of eshaft rotation all can be arranged to get the = right mass flow, but you cannot analyze the engine this way from = fundamental principles. Don't make me draw a PV diagram! Monty=20 None of this matters if you are COMPARING the WORK of the typical = 4-stroke with the WORK of the rotary. This means by definition that you = MUST find a common means of measurement of that WORK. The only place = that this takes place is at 720 degress of crankshaft/eshaft rotation. = At 720 degrees of eshaft rotation the rotary displaces 2.6L. If you = aren't trying to compare the 2 engine types then 3.9L is correct for the = rotary since it rotates 1080 degrees in 3 rotations of the eshaft to = WORK all 6 faces of the 2 rotors (but this isn't a valid comparison to a = Lyc or Chevy!). Ed A. had it right earlier even if he did change his = mind. Ken Powell=20 Bryant, Arkansas=20 501-847-4721=20 C150 / RV-4 under construction ------=_NextPart_000_0002_01C5D356.053A9260 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Actually Ken, that is the only time it matters is when comparing = work. Work=20 is defined as the amount of energy extracted from the working fluid per = unit=20 time. To figure out what this is you must look at the full cycle = and how=20 many of them occur per unit time. Otherwise the comparison is = meaningless. I=20 promise----follow the fluid. Ignore the hardware. Crank shaft degrees = are=20 meaningless. Like I said measure the displacement of your 302 via the = cam=20 drive---it becomes a 604 or if you prefer a 2 cycle 302. 2 cycle, four = cycle,=20 number of equivalent cylinders and numbers of eshaft rotation all = can be=20 arranged to get the right mass flow, but you cannot analyze the engine = this way=20 from fundamental principles.

Don't make me draw a PV diagram!

Monty

None of this matters if you are COMPARING the WORK of the typical = 4-stroke=20 with the WORK of the rotary. This means by definition that you = MUST find a=20 common means of measurement of that WORK. The only place that this = takes=20 place is at 720 degress of crankshaft/eshaft rotation. At 720 = degrees of=20 eshaft rotation the rotary displaces 2.6L. If you aren't trying to = compare=20 the 2 engine types then 3.9L is correct for the rotary since it rotates = 1080=20 degrees in 3 rotations of the eshaft to WORK all 6 faces of the 2 rotors = (but=20 this isn't a valid comparison to a Lyc or Chevy!). Ed A. had it = right=20 earlier even if he did change his mind.

Ken Powell
Bryant, Arkansas
501-847-4721
C150 / = RV-4=20 under construction

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