X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost03.isp.att.net ([204.127.217.103] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5597369 for flyrotary@lancaironline.net; Wed, 13 Jun 2012 11:56:47 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.103; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-148-237.mco.bellsouth.net[98.85.148.237]) by isp.att.net (frfwmhc03) with SMTP id <20120613155610H0300crh9be>; Wed, 13 Jun 2012 15:56:11 +0000 X-Originating-IP: [98.85.148.237] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] IVO Prop Users... Date: Wed, 13 Jun 2012 11:56:10 -0400 Message-ID: <5410C9E12C5047079155483EA72ED6D0@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CD495B.86CF3330" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac1JGBJgdwLC6V12SHSATe3lYJWz4gAZEaIQ X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_000F_01CD495B.86CF3330 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Elsewhere on this same site he claims" You can roughly calculate the VE of an engine if hp is known with: VE = 5600 X HP divided by (RPM X Displacement in cubic inches) This would indicate that the rotary, with a VE of 1 would require a displacement of 160 cu in to get a HP of 180 at 6300 rpm or 200 at 7000 rpm. So what is the deal on the 1300 cc? that is about 80 cu in. about half what would be required to produce the HP we hope to get. Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com Sent: Tuesday, June 12, 2012 11:53 PM To: Rotary motors in aircraft Subject: [FlyRotary] IVO Prop Users... I would highly recommend that any of you running an IVO in-flight adjustable prop to take a few minutes of your time and read Ross's write up on his SDS site...some great information found at: http://www.sdsefi.com/rv13.htm One thing I found interesting for instance was his use of a dedicated AMP meter on his IVO circuit which then allows him to set his pitch based on the amount of amps he is pulling... Doug Lomheim RV-9A, 13B / FWF ------=_NextPart_000_000F_01CD495B.86CF3330 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Elsewhere on this same site he = claims”

You can roughly calculate the VE of an engine if hp is known = with:

VE =3D 5600 X HP divided by (RPM X Displacement in cubic = inches)

This would indicate that the = rotary, with a VE of 1 would require a displacement of 160 cu in to get a HP of = 180 at 6300 rpm or 200 at 7000 rpm.

So what is the deal on the 1300 = cc? that is about 80 cu in. about half what would be required to = produce the HP we hope to get.

Bill B

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com
Sent: Tuesday, June 12, = 2012 11:53 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] IVO = Prop Users...

I would highly recommend that any = of you running an IVO in-flight adjustable prop to take a few minutes of = your time and read Ross's write up on his SDS site...some great information = found at:

=

http://www.sdsefi.com/rv13.htm

One thing I found interesting for instance was his use of a dedicated AMP meter on his IVO = circuit which then allows him to set his pitch based on the amount of = amps he is pulling...

Doug = Lomheim

RV-9A, 13B / = FWF

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