X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4962662 for flyrotary@lancaironline.net; Sat, 30 Apr 2011 10:44:05 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.52; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-145-79.mco.bellsouth.net[98.85.145.79]) by isp.att.net (frfwmhc02) with SMTP id <20110430144328H0200osfune>; Sat, 30 Apr 2011 14:43:28 +0000 X-Originating-IP: [98.85.145.79] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Intakes old and new Date: Sat, 30 Apr 2011 10:44:33 -0400 Message-ID: <9063D7BCEE044071ADE9491BDCC8D6C8@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0015_01CC0723.98086AC0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcwHPYTXtsFntSNUQieaSusfSfi9+wAB0fJw X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0015_01CC0723.98086AC0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Ed, Do the intake runners have bell mouths at the top inside the plastic plenum? If so, how did you construct them? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Saturday, April 30, 2011 9:49 AM To: Rotary motors in aircraft Subject: [FlyRotary] Intakes old and new Here is the induction system set up I first flew with Phtos MVC-007F JPG). 4 injectors into a TWM dual throat Webber Throttle body (2" dia throats) into a two into four manifold. The engine started easily and operated fine - with the exception it was low on power. Top speed was 185 MPH TAS. The apparently problem was that while this set up did well for the rotary racing crowd when theirengines hit 9000 rpm - it sucked (but not very well) at the lower rpms like 5000. So I swap it out for my current design using an 65mm dia mustang throttle body and smaller diameter runners and immedately picked up 10 MPH top airspeed and 400 ft/min improvement in Rate of climb. It was the beginning of my understanding that what works well for one environment and set of operating conditions may provide lousy results under different circumstances. The other two photos show the intake that produced the best results for my installation and which has now been on the aircraft for over 6 years, top speed achieved with this intake was 196 MPH TAS with the old 2.17:1 and 68x72 prop. Same intake with the 2:85:1 and 74x88 prop topped out at 200 MPH TAS. Ed Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_0015_01CC0723.98086AC0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Ed,

Do the intake runners have bell = mouths at the top inside the plastic plenum?   If so, how did you = construct them?

 

Bill B

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Saturday, April 30, = 2011 9:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] = Intakes old and new

 

Here is the induction system set up I first flew with = Phtos MVC-007F JPG).  4 injectors into a TWM dual throat Webber Throttle = body (2" dia throats) into a two into four manifold.  The engine = started easily and operated fine - with the exception it was low on power.  = Top speed was 185 MPH TAS. 

 

The apparently problem was that while this set up did = well for the rotary racing crowd when theirengines hit 9000 rpm - it sucked = (but not very well) at the lower rpms like 5000.  So I swap it out for my = current design using an 65mm dia mustang throttle body and smaller diameter runners and immedately picked up 10 MPH top airspeed and 400 ft/min improvement in = Rate of climb.

 

It was the beginning of my understanding that what = works well for one environment and set of operating conditions may provide = lousy results under different circumstances.  The other two photos show = the intake that produced the best results for my installation and which has = now been on the aircraft for over 6 years, top speed achieved with this = intake was 196 MPH TAS with the old 2.17:1 and 68x72 prop.  Same intake with = the 2:85:1 and 74x88 prop topped out at 200 MPH = TAS.

 

Ed

Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton = Road
Weddington, = NC 28104
http://www.andersonee.com
http://www.eicommander.com=

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