X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.245] (HELO mail.qnsi.net) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 5993832 for flyrotary@lancaironline.net; Thu, 03 Jan 2013 15:01:28 -0500 Received-SPF: none receiver=logan.com; client-ip=66.219.56.245; envelope-from=bhughes@qnsi.net Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CDE9ED.0955B15A" Subject: RE: [FlyRotary] Re: turbo manifold Disposition-Notification-To: "Bobby J. Hughes" Date: Thu, 3 Jan 2013 14:00:53 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.5 Message-ID: <74120FDE88CAFE4DBDA8814BCE20A3F34BA510@qnsi-mail.qnsi.net> X-MS-Has-Attach: X-MS-TNEF-Correlator: thread-topic: [FlyRotary] Re: turbo manifold thread-index: Ac3p7QTcZ8YPBUNjQXuUU+COaT1YEg== From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01CDE9ED.0955B15A Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Steve, =20 Very interesting results. Did you have a muffler downstream of the turbo for the Renesis test?=20 =20 Bobby Hughes =20 =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net ] On Behalf Of Steven W. Boese Sent: Wednesday, January 02, 2013 12:24 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: turbo manifold =20 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 13B normally 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. =20 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. =20 Steve Boese RV6A, 1986 13B NA, RD1A, EC2 =20 ________________________________ 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=20 =20 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. =20 Cheers =20 Steve Izett Glasair SIIS RG Renesis =20 =20 ------_=_NextPart_001_01CDE9ED.0955B15A Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Steve,

 

Very interesting results. Did you have a muffler downstream of the = turbo for the Renesis test?

 

Bobby Hughes

 

 

From:= = Rotary motors in aircraft [mailto:flyro= tary@lancaironline.net] On = Behalf Of Steven W. Boese
Sent: Wednesday, January 02, = 2013 12:24 AM
To: Rotary motors in aircraft
Subject: = [FlyRotary] Re: turbo manifold

 

= 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 13B normally = 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

 

 

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