Return-Path: Received: from fed1rmmtao11.cox.net ([68.230.241.28] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 576239 for flyrotary@lancaironline.net; Tue, 21 Dec 2004 22:48:58 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.28; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao11.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041222034826.YWVC28808.fed1rmmtao11.cox.net@BigAl> for ; Tue, 21 Dec 2004 22:48:26 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Oil coolers Date: Tue, 21 Dec 2004 19:48:44 -0800 Message-ID: <000001c4e7d9$22d32940$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4E796.14AFE940" 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_01C4E796.14AFE940 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 http://www.fluidyne.com/pl_theoc.html =20 =20 Really liked the DB 30517 (3.75" thick double pass model) Will = probably use this one on my -8. =20 =20 Tracy =20 =20 Perhaps you mean use "two" instead of "this one". I looked closely (longingly) at the fluidyne when I was in the market for a cooler; but = they just don't make on with the capacity for the 20B. One DB 30517 would = handle neither the flow nor heat rejection needed; however 2 in parallel would = do it. At least that's what my analysis says. =20 Al =20 Nope, at least I don't think so. Here's my take on it. =20 =20 The Mazda cooler has 180 CU In. core area and gives me enough cooling = for the 13B. I'm assuming for now that the dimensions for the Fluidyne are = core area (must check) which give it 275 cu in, which is 153% of the Mazda. Pretty good match, at least on paper. The "effectiveness quotient" = for the Fluidyne at almost double the thickness is not as good but I'm = hoping the much better ducting and pressure recovery on the -8 will cancel that out. The higher delta T air temp will give less cooling drag, at least = in my universe : ) =20 In any case, the main -8 mission calls for 100 HP at >=3D18,000 ft. = It'll work. =20 Tracy (please don't ask me to define "effectiveness quotient") =20 I was over stating it a bit suggesting two to make the point; and it has = a little more volume than I thought. My old notes say about 230 cu. in. = for that one; I think the dimensions they give include the end tanks. Yeah; it'll work at 100hp and 18000, but might be marginal getting up there. I once had pressure drop flow data from Fluidyne, but guess I tossed it. Might be worth checking. =20 Al ------=_NextPart_000_0001_01C4E796.14AFE940 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
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http://www.fluidyne.com/pl_t= heoc.html 

 

 Really liked the DB 30517 (3.75" thick double pass model)  Will = probably use this one on my -8.   

 

 Tracy   

 

Perhaps you mean = use “two” instead of “this one”.  I looked = closely (longingly) at the fluidyne when I was in the market for a cooler; but = they just don’t make on with the capacity for the 20B.  One DB = 30517 would handle neither the flow nor heat rejection needed; however 2 in = parallel would do it.  At least that’s what my analysis = says.

 

Al

 

 Nope, at least I don't think so.   Here's my take on it.   =

 

The Mazda cooler has 180 CU In. core area and gives me enough cooling for = the 13B.  I'm assuming for now that the dimensions for the Fluidyne are = core area (must check) which give it 275 cu in, which is 153% of the = Mazda.  Pretty good match, at least on paper.   The = "effectiveness quotient"  for the Fluidyne at almost double the thickness is = not as good but I'm hoping the much better ducting and pressure recovery on the = -8 will cancel that out.  The higher delta T air temp will give less = cooling drag, at least in my universe : )

 

In any case,  the main -8 mission calls for 100 HP at  = >=3D18,000 ft.  It'll work.

 

 Tracy   (please don't ask me to define "effectiveness = quotient")

 

I was over stating it a bit = suggesting two to make the point; and it has a little more volume than I = thought.  My old notes say about 230 cu. in. for that one; I think the dimensions = they give include the end tanks.  Yeah; it’ll work at 100hp and 18000, = but might be marginal getting up there.

I once had pressure drop flow = data from Fluidyne, but guess I tossed it.  Might be worth checking.

 

Al

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