Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 607056 for flyrotary@lancaironline.net; Fri, 14 Jan 2005 10:15:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050114151453.DYBS2518.imf25aec.mail.bellsouth.net@rd> for ; Fri, 14 Jan 2005 10:14:53 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: water cooled matrix in the oil pan Date: Fri, 14 Jan 2005 09:15:10 -0600 Message-ID: <000001c4fa4b$d6d0b5f0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4FA19.8C3645F0" 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 V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4FA19.8C3645F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Tracy once used a copper line running coolant through his oil pan, but this was on an early version of his 13B adventures. Wasn't he running his fuel return through the pan on the way back to the wing tanks? I've thought about trying to use the fuel loop for oil/fuel heat exchange, but I don't think you could do this full time. The problem would be when you only have a few gallons of fuel in the tanks. I think the fuel temp could rise faster than the skin of the tanks could cool it. It would make an interesting experiment. Another application of this fuel/oil cooling that comes to mind is for aux cooling when needed. Say I install that small Fluidyne oil/air cooler, and it won't allow me to use full throttle for an unlimited climb. I could augment that with the fuel/oil exchanger for climb only. You'd have to monitor the fuel temp and shut it down if they got too high. Of course it also means extra hoses, and valves of some sort to divert the return fuel. Probably more trouble than it's worth unless you could use it full time. Interestingly, a Navy helicopter instructor was telling me that the turbine engines use an oil/fuel exchanger. I guess turbines need the fuel to be warm, and also need a way to cool the oil. Apparently, this does both. Cheers, Rusty (don't get me started on wacky ideas) ------=_NextPart_000_0001_01C4FA19.8C3645F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Tracy once used a copper line running coolant through = his oil=20 pan, but this was on an early version of his 13B adventures.

 
Wasn't = he running his=20 fuel return through the pan on the way back to the wing = tanks?  =20
 
I've = thought about=20 trying to use the fuel loop for oil/fuel heat exchange, but I don't = think you=20 could do this full time.  The problem would be when you only have a = few=20 gallons of fuel in the tanks.  I think the fuel temp could rise = faster than=20 the skin of the tanks could cool it.  It would make an interesting=20 experiment. 
 
Another = application of=20 this fuel/oil cooling that comes to mind is for aux cooling when = needed. =20 Say I install that small Fluidyne oil/air cooler, and it won't allow me = to use=20 full throttle for an unlimited climb.  I could augment that with = the=20 fuel/oil exchanger for climb only.  You'd have to monitor the fuel = temp and=20 shut it down if they got too high.  Of course it also means = extra=20 hoses, and valves of some sort to divert the return fuel.  Probably = more=20 trouble than it's worth unless you could use it full time. =20  
 
Interestingly, a Navy=20 helicopter instructor was telling me that the turbine engines use = an=20 oil/fuel exchanger.  I guess turbines need the fuel to be warm, and = also=20 need a way to cool the oil.  Apparently, this does = both.   =20
 
Cheers,
Rusty = (don't get me=20 started on wacky ideas)



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