Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 574258 for flyrotary@lancaironline.net; Mon, 20 Dec 2004 12:57:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041220175655.KMDW2073.imf19aec.mail.bellsouth.net@rd> for ; Mon, 20 Dec 2004 12:56:55 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Oil cooler mount updated pictures Date: Mon, 20 Dec 2004 11:56:55 -0600 Message-ID: <000001c4e6bd$4af98350$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4E68B.005F1350" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4E68B.005F1350 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 1. Used the early RV-4 FP prop cowl (40" FW to prop flange) which is = about 1.5" longer than current version =20 2. Used the RX-5 Cosmo oil cooler which is shorter but wider than the = RX-7 cooler, and has ports more conveniently located than the RX-7 cooler. = It was a gift from my brother Barry who owned the RX-5 donor car.=20 =20 =20 Thanks Tracy. That certainly takes the mystery out of it. I originally = had the RV-3 cowl (they're now the same, but you trim the RV-3 shorter), and Fred made the mount so the prop would end up where the Lycoming would = have been on the stock mount. When I replaced the cowl, I got the universal RV-3/-4 cowl, and decided to leave it full length, rather than trimming = it several inches to make it the same as the original RV-3 cowl. I made up = the difference with a very nice Saber prop hub extension. If you have the = same length cowl, and no prop extension, then your engine is several inches farther from the FW than mine. I just made a note to measure my FW to = prop flange distance, so that will confirm it.=20 =20 I would love to put the cooler under the engine like Finn has it, but there's just no way with my exhaust in the way. I'm pretty happy with = the exhaust system, so I don't plan to change that, which means I have to = come up with another solution. =20 =20 -I could easily fit one of the FD coolers, but I don't think that would = be big enough. =20 =20 -I could possibly fit an oil to water heat exchanger, and use the = original oil cooler location for a 3rd water cooler. Don't care too much for = this idea, mostly due to the extra weight, and complexity of hoses. Also, = I'd still have to worry about bursting the oil cooler on the exchanger = unless I knew is was robust enough. =20 =20 -I could use a stock 2nd gen cooler, and let the back end dip under the exhaust pipes. This would drop the rear edge of the cowl a few inches, which would add some drag. On the other hand, it would block some high speed air from hitting the muffler, and add to the cooling exit area. Another downside is that it's still putting the oil cooler very close = to, and directly in front of the exhaust. =20 =20 -Finally, I could find another type of oil cooler, which would be closer = to the size of the evap core. In the old archives, Mike Wills mentioned Fluidyne. I had one of their radiators in my FD, and it was very well built. Here's a link to the oil cooler family I'm thinking about. They look pretty good to me. What do you think? http://www.fluidyne.com/pl_theoc.html =20 Thanks, Rusty (waiting for a giant estimate for replacing my dead heat pump) ------=_NextPart_000_0001_01C4E68B.005F1350 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
1.  Used the early RV-4 FP prop cowl (40" = FW to prop=20 flange) which is about 1.5" longer than current = version  
2.  Used the RX-5 Cosmo oil cooler which = is shorter=20 but wider than the RX-7 cooler, and has ports more conveniently located = than the=20 RX-7 cooler.  It was a gift from my brother Barry who owned the = RX-5 donor=20 car. 
 
 
Thanks=20 Tracy.  That certainly takes the mystery out of it.  I = originally=20 had the RV-3 cowl (they're now the same, but you trim the RV-3 shorter), = and=20 Fred made the mount so the prop would end up where the = Lycoming would=20 have been on the stock mount.  When I replaced the cowl, I got = the=20 universal RV-3/-4 cowl, and decided to leave it full length, rather than = trimming it several inches to make it the same as the original RV-3=20 cowl.  I made up the difference with a very nice Saber prop = hub=20 extension.  If you have the same length cowl, and no prop = extension, then=20 your engine is several inches farther from the FW than mine.  = I just=20 made a note to measure my FW to prop flange distance, so that will = confirm=20 it. 
 
I=20 would love to put the cooler under the engine like Finn has it, but = there's=20 just no way with my exhaust in the way.  I'm pretty happy with the = exhaust=20 system, so I don't plan to change that, which means I have to come = up with=20 another solution. 
 
-I=20 could easily fit one of the FD coolers, but I don't think that would be = big=20 enough. 
 
-I=20 could possibly fit an oil to water heat exchanger, and use the original = oil=20 cooler location for a 3rd water cooler.  Don't care too much for = this idea,=20 mostly due to the extra weight, and complexity of hoses.  Also, I'd = still=20 have to worry about bursting the oil cooler on the exchanger unless = I knew=20 is was robust enough.  
 
-I=20 could use a stock 2nd gen cooler, and let the back end dip under = the=20 exhaust pipes.  This would drop the rear edge of the cowl = a few=20 inches, which would add some drag.  On the other hand, it = would block=20 some high speed air from hitting the muffler, and add to the cooling = exit=20 area.   Another downside is that it's still putting the oil = cooler=20 very close to, and directly in front of the=20 exhaust.  
 
-Finally, I could find another type of oil cooler, which would = be closer=20 to the size of the evap core.   In the old archives, Mike = Wills=20 mentioned Fluidyne.  I had one of their radiators in my FD, and it = was very=20 well built.  Here's a link to the oil cooler family I'm thinking=20 about.  They look pretty good to me.  What do you=20 think?   http://www.fluidyne.com/pl= _theoc.html
 
Thanks,
Rusty=20 (waiting for a giant estimate for replacing my dead heat=20 pump)
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