X-Virus-Scanned: clean according to Sophos on Logan.com From: "Neil Unger" Received: from nskntmtas04p.mx.bigpond.com ([61.9.168.146] verified) by logan.com (CommuniGate Pro SMTP 6.1.2) with ESMTPS id 7696268 for flyrotary@lancaironline.net; Sat, 16 May 2015 18:45:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=61.9.168.146; envelope-from=neil.unger@bigpond.com Received: from nskntcmgw07p ([61.9.169.167]) by nskntmtas04p.mx.bigpond.com with ESMTP id <20150516224442.SENQ17640.nskntmtas04p.mx.bigpond.com@nskntcmgw07p> for ; Sat, 16 May 2015 22:44:42 +0000 Received: from UserPC ([101.174.186.234]) by nskntcmgw07p with BigPond Outbound id Umke1q00953rxU501mkgzF; Sat, 16 May 2015 22:44:42 +0000 X-Authority-Analysis: v=2.0 cv=EJGEIilC c=1 sm=1 a=6LOQuyDnC94H78B51VJEoA==:17 a=1IlZJK9HAAAA:8 a=ZZWgLnjIUCmcIn6yFuoA:9 a=QEXdDO2ut3YA:10 a=Ia-xEzejAAAA:8 a=liIc7biUwuHR6HmsitQA:9 a=_W_S_7VecoQA:10 a=6LOQuyDnC94H78B51VJEoA==:117 Message-ID: To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Engine Cooling - Airframe Specific & PSRU Date: Sun, 17 May 2015 08:44:38 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01D0907D.B5440530" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01D0907D.B5440530 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Rick, Cooling is not the problem presented. I have too much cooling to = the end that I had to install a thermostat contrary to all advice . = While Paul Lamar has his detractors, his cooling book does show how to = cool a mazda. I am currently doing another cowl to lessen the drag and = sincve not operational cannot say what difference it will make. =20 PSRU. I am almost ready to install my first PSRU a copy basically = of tracy=E2=80=99s. Will be done by the end of the month, so 50 hours = of testing in front of me before I will breath easier. Neil. From: Richard Van Camp=20 Sent: Sunday, May 17, 2015 8:30 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Engine Cooling - Airframe Specific & PSRU These cooling issues are not trivial to overcome and I am getting = concerned if the rotary/PSRU is the right choice for me to make. Do not = get me wrong, I love the powerplant. How can you not? These = integration issues are not simple to conquer. How many robust aircraft = are currently flying? What aircraft are these? Most members here are = building or flying aircraft that will fly circles around the small = 4-passenger tail dragger I plan to build. In contrast you have far = greater air speeds to cool a captive volume of water than my 100-125 = knots. Yet, I suspect I have more free volume to work with than the = streamlined shape of the Lancair or Velocity. I also wanted to ask about the PSRU. Have Tracey's efforts stood the = test of time? It seemed to have some useful features but, the PSRU can = be a source of challenges as well. I noticed the Cozy Girls have passed = this on but, have not remained on radar consistently to determine what = its fate will be. Rick ------=_NextPart_000_000D_01D0907D.B5440530 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Rick,  Cooling is not the problem presented.  I have too = much=20 cooling to the end that I had to install a thermostat contrary to all = advice .=20 While Paul Lamar has his detractors, his cooling book does show how to = cool a=20 mazda.  I am currently doing another cowl to lessen the drag and = sincve not=20 operational cannot say what difference it will make. 
    PSRU.  I am almost ready to install my = first PSRU a=20 copy basically of tracy=E2=80=99s.  Will be done by the end of the = month, so 50=20 hours of testing in front of me before I will breath easier.  = Neil.
 
Sent: Sunday, May 17, 2015 8:30 AM
Subject: [FlyRotary] Engine Cooling - Airframe Specific = &=20 PSRU
 
These cooling issues = are not=20 trivial to overcome and I am getting concerned if the rotary/PSRU is the = right=20 choice for me to make.  Do not get me wrong, I love the = powerplant. =20 How can you not?  These integration issues are not simple to = conquer. =20 How many robust aircraft are currently flying?  What aircraft are=20 these?  Most members here are building or flying aircraft that will = fly=20 circles around the small 4-passenger tail dragger I plan to build.  = In=20 contrast you have far greater air speeds to cool a captive volume of = water than=20 my 100-125 knots.  Yet, I suspect I have more free volume to work = with than=20 the streamlined shape of the Lancair or Velocity.
 
I also wanted to ask = about the=20 PSRU.  Have Tracey's efforts stood the test of time?  It = seemed to=20 have some useful features but, the PSRU can be a source of challenges as = well.  I noticed the Cozy Girls have passed this on but, have not = remained=20 on radar consistently to determine what its fate will be.
 
Rick
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