Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.6) with ESMTP id 2711263 for flyrotary@lancaironline.net; Wed, 05 Nov 2003 14:51:50 -0500 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id hA5JpWhg020646 for ; Wed, 5 Nov 2003 14:51:43 -0500 (EST) Message-ID: <000a01c3a3d5$b0b32d80$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: DIE Summary Date: Wed, 5 Nov 2003 14:47:40 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C3A3AB.C31E8C00" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C3A3AB.C31E8C00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Finn, My suggestion is go to Paul Yaws excellent technical article on = intakes and exhausts at http://www.yawpower.com/dectech.html There he lists the stock port timing specifications as well as some of = the more radical Racing Beat port timings. Me, I wouldn't know how to measure the port timing. Maybe you could = stick your finger in the port and slowly turn the crank until you feel = the side of the lobe, then measure the E shaft degrees off the crank = pulley {:>). Perhaps Lynn or someone has a process for doing so. I = think I recall someone showing the process on a side housing, but that = was a while ago. If you engine has stock timing then its no problem, or if you are = certain what any modifications to the timing are. Port timing can make = a quite a difference, so guessing is not recommended. Ed Anderson What we now need is a table of IC and IO values for different year = housings and portings. Or maybe an illustration on how to measure them. Finn Ed Anderson wrote: Ok, Folks The DIE related products include: PDF of the Slides used in the Shady Bend presentation 1.4 Meg PDF of the Formal (sort of) Mathematical derivation of the equations = 225K PDF of a short summary of the equations Attached to this e mail 95K Excel DIE Spreadsheet for doing your own DIE calculations. 250K However, for those of you interested, I have attached a very brief summary of the DIE equation derivation. Its only two pages, with some graphs attached and is probably not that easy to follow without the = expanded step by step derivation process shown in the full up presentation. Hopefully, it will keep those interested in the DIE occupied until the full-up presentation is on the RWS web site {:>). Best Regards Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0007_01C3A3AB.C31E8C00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Finn,

My suggestion is go = to Paul Yaws=20 excellent technical article on intakes and exhausts at

http://www.yawpower.com/dec= tech.html

There he lists the stock port timing = specifications=20 as well as some of the more radical Racing Beat port = timings.

Me, I wouldn't know how to measure the = port=20 timing. Maybe you could stick your finger in the port and slowly = turn=20 the crank until you feel the side of the lobe, then measure the E = shaft=20 degrees off the crank pulley {:>). Perhaps Lynn or someone has = a=20 process for doing so. I think I recall someone showing the process = on a side housing, but that was a while ago.

If you engine has stock timing then its = no problem,=20 or if you are certain what any modifications to the timing are. = Port=20 timing can make a quite a difference, so guessing is not=20 recommended.

Ed Anderson

What we now need is a table of IC and IO values for = different year=20 housings and portings.
Or maybe an illustration on how to measure=20 them.

Finn

Ed Anderson wrote:

Ok, Folks

 The DIE related products include:

PDF of the Slides used in the Shady Bend presentation 1.4 Meg
PDF of the Formal (sort of)  Mathematical derivation of the equations =
225K
PDF of a short summary of the equations Attached to this e mail 95K
Excel DIE Spreadsheet for doing your own DIE calculations. 250K

     However, for those of you interested, I have attached a very brief
summary of the DIE equation derivation.  Its only two pages, with some
graphs attached and is probably not that easy to follow without the =
expanded
step by step derivation process shown in the full up presentation.
 Hopefully, it will keep those interested in the DIE occupied until the
full-up presentation is on the RWS web site {:>).

Best Regards

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

------=_NextPart_000_0007_01C3A3AB.C31E8C00--