X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nk11p08mm-asmtp002.mac.com ([17.158.58.247] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 5990770 for flyrotary@lancaironline.net; Wed, 02 Jan 2013 01:44:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=17.158.58.247; envelope-from=steveizett@me.com MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_QFLPoCL01lcbgBXWTL9BSQ)" Received: from [10.1.1.6] (58-7-102-119.dyn.iinet.net.au [58.7.102.119]) by nk11p08mm-asmtp002.mac.com (Oracle Communications Messaging Server 7u4-26.01(7.0.4.26.0) 64bit (built Jul 13 2012)) with ESMTPSA id <0MFZ00GN2K0FZ500@nk11p08mm-asmtp002.mac.com> for flyrotary@lancaironline.net; Wed, 02 Jan 2013 06:43:31 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.9.8327,1.0.431,0.0.0000 definitions=2013-01-02_01:2012-12-31,2013-01-02,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1203120001 definitions=main-1301010424 From: Stephen Izett Subject: Re: [FlyRotary] Re: turbo manifold Date: Wed, 02 Jan 2013 14:43:26 +0800 In-reply-to: To: Rotary motors in aircraft References: Message-id: <2011F751-0EB6-48BE-BFE3-8CEB60355D07@me.com> X-Mailer: Apple Mail (2.1283) --Boundary_(ID_QFLPoCL01lcbgBXWTL9BSQ) Content-type: text/plain; CHARSET=US-ASCII Content-transfer-encoding: 7BIT Steve So are we observing that the lower plot of the Renesis NA and the Renesis TC as being pretty much the same implies that the TC back pressure appeared to have no significant effect? What did the intake manifolds for both NA engines look like. Power output seems a little low. However I'm not familiar with what HorsePower to MP you could expect. Thanks Steve Izett On 02/01/2013, at 2:24 PM, Steven W. Boese wrote: > Based on the relative insensitivity of the Renesis to backpressure, a turbo was installed on the test stand Renesis. I had previously installed the same stock 1988 RX7 turbo on the test stand 13B and observed a large penalty in efficiency at cruise power levels. As a result, I had lost interest in a turbo option. At the rotary gathering this fall, Bobby expressed an interest in how the Renesis would respond to a turbo. So some data was collected in this regard. Those present at the rotary gathering may recognize the plot of data that is attached. It showed the power generated with a 13Bnormally aspirated (NA, red), supercharged (SC, black), and turbocharged (TC, lighter blue). Data from the normally aspirated (NA, green) and turbocharged (TC, darker blue) Renesis has been added to this plot. The results seem remarkable in that there appears to be no penalty at cruise power for the turbo installation on the Renesis other than weight and complexity. > > The data by no means represents an extensive study, but the difference in response of the Renesis to the turbo compared to the 13B seems worthy of reporting. Field elevation here is 7200 ft with DA normally above 8000 ft which limits normally aspirated MAP to 23" Hg at WOT. An intercooler was installed on the test stand for both engines. No attempt to boost the Renesis above 30" MAP was made. It is also unlikely that the turbo tested would be the best match for this application. Any thoughts on identifying an appropriate turbo would be welcome. > > Steve Boese > RV6A, 1986 13B NA, RD1A, EC2 > > From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Stephen Izett [steveizett@me.com] > Sent: Tuesday, January 01, 2013 7:23 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: turbo manifold > > Steve > > Did that engine end up turboed? > I have a Renesis, hopefully flying in the next 6 months but am seriously interested in turboing it down the road. > > Cheers > > Steve Izett > Glasair SIIS RG Renesis > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --Boundary_(ID_QFLPoCL01lcbgBXWTL9BSQ) Content-type: text/html; CHARSET=US-ASCII Content-transfer-encoding: quoted-printable
Steve

So are we = observing that the lower plot of the Renesis NA and the Renesis TC as = being pretty much the same implies that the TC back pressure appeared to = have no significant effect?

What did the intake = manifolds for both NA engines look like.
Power output seems a = little low. However I'm not familiar with what HorsePower to MP you = could = expect.

Thanks

Steve = Izett




On 02/01/2013, at 2:24 PM, Steven W. Boese wrote:

 to backpressure, a = turbo was installed on the test stand = Renesis.  I had previously installed the same = stock 1988 RX7 turbo on the test = stand 13B and observed a large = penalty in efficiency at cruise power levels.  As = a result, I had lost interest in a turbo option.  At the rotary = gathering this fall, Bobby expressed an interest in how = the Renesis would respond to a = turbo.  So some data was collected in this regard.  Those = present at the rotary gathering may recognize the plot of data that is = attached.  It showed the power generated with = a 13Bnormally aspirated (NA, red), = supercharged (SC, black), and turbocharged (TC, = lighter blue).  Data from the normally aspirated (NA, green) and = turbocharged (TC, darker = blue) Renesis has been added to this = plot.  The results seem remarkable in that there appears to be no = penalty at cruise power for the turbo installation on = the Renesis other than weight and = complexity.

The = data by no means represents an extensive study, but the difference in = response of the Renesis to the turbo compared to = the 13B seems worthy of = reporting.  Field elevation here is 7200 ft with DA normally above = 8000 ft which limits normally aspirated MAP to 23" Hg at = WOT.  An intercooler was installed on the test stand for = both engines.  No attempt to boost = the Renesis above 30" MAP was = made.  It is also unlikely that the turbo tested would be the best = match for this application.  Any thoughts on identifying an = appropriate turbo would be welcome.

 

Steve = Boese
RV6A, = 1986 13B NA, = RD1A, = EC2

From: Rotary motors in aircraft = [flyrotary@lancaironline.net] on behalf of Stephen Izett [steveizett@me.com]
Sent: Tuesday, January 01, = 2013 7:23 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: turbo = manifold

Steve

Did = that engine end up turboed?
I have a Renesis, hopefully flying = in the next 6 months but am seriously interested in turboing it down the = road.

Cheers

Steve = Izett
Glasair SIIS RG Renesis
http://www.flyrotary.com/
Archiv= e and UnSub:   http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html

= --Boundary_(ID_QFLPoCL01lcbgBXWTL9BSQ)--