X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao106.cox.net ([68.230.241.40] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3906382 for flyrotary@lancaironline.net; Fri, 30 Oct 2009 18:13:16 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.40; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao106.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20091030221241.FOPJ21192.fed1rmmtao106.cox.net@fed1rmimpo03.cox.net> for ; Fri, 30 Oct 2009 18:12:41 -0400 Received: from BigAl ([72.192.133.78]) by fed1rmimpo03.cox.net with bizsmtp id zACg1c00N1hf1Cg04ACgkK; Fri, 30 Oct 2009 18:12:41 -0400 X-VR-Score: -30.00 X-Authority-Analysis: v=1.0 c=1 a=gXMTCpu2p1-ZJjMPYP0A:9 a=9r24Deq83IO9_ps3kdMIr_645GcA:4 a=Y2VNeNrzAAAA:8 a=yMhMjlubAAAA:8 a=TW66zc2HAAAA:8 a=SSmOFEACAAAA:8 a=HQ31llbKAAAA:8 a=K51LFOf3R5_-tk6OUa4A:9 a=e0aED5tNNs7zvWwl28UA:7 a=zf5Lc7cset-NmF5AFi1AAVzBk0oA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Cooling report Date: Fri, 30 Oct 2009 15:13:47 -0800 Message-ID: <7E9DE58D3FD445438A393D8C7FA4679E@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01CA5973.947C84E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 In-Reply-To: Importance: Normal Thread-Index: AcpZhYbEx9tVeEjPQBaGgXaLLX77HwALxukg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_000E_01CA5973.947C84E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Rino, any comments on the Griffin oil cooler location and inlet ducting = Vs the RX7 oil cooler location and ducting? If oil flow was not the problem it must have been air flow. Jeff If there was not sufficient air flow, then the air outlet temp would be = very high, not very low - unless the temp number is not correct, or there was = a great deal of by-pass flow. =20 Re: Here is my fan installation. It is a 4-blade, pull, high flow, = Spall. The inlet scoop is sealed to the other side of the rad. I don't know whether it spins in flight when turned off, but there is no evidence = that it does. It works fine after 160 hours in flight. If it is a concern, one = could always use a relay that shorts the leads when turned off serve as electromagnetic brake. A spinning fan would be more restrictive to flow being forced through it than one that is stationary - contrary to one's intuition. =20 Al ------=_NextPart_000_000E_01CA5973.947C84E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Rino, any comments on the Griffin oil cooler location and inlet ducting Vs the RX7 = oil cooler location and ducting?

If oil flow was not the problem it must have been air = flow.

=

Jeff<= /font>

If there was not sufficient air = flow, then the air outlet temp would be very high, not very low – unless = the temp number is not correct, or there was a great deal of by-pass = flow.

 

Re: Here is my fan = installation.  It is a 4-blade, pull, high flow, Spall.  The inlet scoop is sealed = to the other side of the rad.  I don’t know whether it spins in = flight when turned off, but there is no evidence that it does. It works fine after = 160 hours in flight. If it is a concern, one could always use a relay that = shorts the leads when turned off serve as electromagnetic brake.  A = spinning fan would be more restrictive to flow being forced through it than one that = is stationary – contrary to one’s intuition.

 

Al

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