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Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2645938 for flyrotary@lancaironline.net; Tue, 21 Oct 2003 19:42:43 -0400 Received: from rad ([65.80.160.144]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20031021234242.YON1789.imf24aec.mail.bellsouth.net@rad> for ; Tue, 21 Oct 2003 19:42:42 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: temps behind radiator? Date: Tue, 21 Oct 2003 18:42:45 -0500 Message-ID: <00ec01c3982d$072c7450$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00ED_01C39803.1E566C50" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_00ED_01C39803.1E566C50 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Yeah, yeah, I get the hint. Well, I do have such an instrument in my = plane with a sensor in front of and behind the right-side rad and seeing as = much as 50 - 60 deg F temp rise. This could mean 2 things. Terrific rad performance or lousy air flowrate. The airflow on the right is not as good as on left where I happen to know it is pretty good, so I should install a temp probe there too.=20 =20 Thanks for the temps. Do you agree that it makes more sense to put the = oil cooler in front of the rad, since the oil cooler will have less of an = effect on the performance of the rad, than vice versa? I'm probably going to = end up testing that theory, mostly because I just bought this large = expensive Setrab oil cooler, and I'd like to keep using it. The other factor is = the radiator, I'm down to only 17.25 x 12.5 x 2.25 of radiator that's = uncovered, and still have plenty of extra water cooling available. The smallest standard core at Howe racing is 17.25 x 15.5 x 2.25, so I'm likely to = have more than enough radiator to do the job, even if the oil cooler = pre-heats the air some. Heck, I might even have enough radiator capacity to test = the Evan's coolant. =20 =20 As I see it, there are three cooling modes: =20 1- Full throttle turbo climb of about 180 hp at 100 mph. =20 2- Normal cruise power of about 160 hp at 200 mph. 3- Low power descent, worst case Ed's stealth hamburger approach :-) =20 The difference between 1 and 2 will have to be controlled by a cowl = flap. A thermostat or EWP controller will take care of the water temp for number = 3. I'm not sure how to keep the oil temp up though. What do you guys see = for oil temps in descents? Mine plunges to 120-130F. Maybe a cowl flap = that's really restrictive could handle number 3 as well. =20 =20 Back to the drawing board. I need a really great cowl flap. =20 =20 Rusty (finding out in a few minutes if I have to drive to Greenville, SC tomorrow for a 30 minute job...groan) =20 =20 =20 =20 =20 ------=_NextPart_000_00ED_01C39803.1E566C50 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Yeah, yeah, I get the hint. Well, I do have = such an=20 instrument in my plane with a sensor in front of and behind the = right-side=20 rad and seeing as much as 50 - 60 deg F temp = rise. This=20 could mean 2 things. Terrific rad performance or lousy air=20 flowrate. The airflow on the right is not as good as = on left=20 where I happen to know it is pretty good, so I should install a = temp probe=20 there too.

Thanks for = the=20 temps. Do you agree that it makes more sense to put the oil = cooler=20 in front of the rad, since the oil cooler will have less of an effect on = the=20 performance of the rad, than vice versa? I'm probably going to end = up=20 testing that theory, mostly because I just bought this large = expensive=20 Setrab oil cooler, and I'd like to keep using it. The other factor = is the=20 radiator, I'm down to only 17.25 x 12.5 x 2.25 of radiator that's = uncovered, and=20 still have plenty of extra water cooling available. The smallest = standard=20 core at Howe racing is 17.25 x 15.5 x 2.25, so I'm likely to have = more than=20 enough radiator to do the job, even if the oil cooler pre-heats the air=20 some. Heck, I might even have enough radiator capacity to test the = Evan's=20 coolant.

As I see = it, there are=20 three cooling modes:

1- Full = throttle turbo=20 climb of about 180 hp at 100 mph. =

2- Normal = cruise power=20 of about 160 hp at 200 mph.

3- Low = power descent,=20 worst case Ed's stealth hamburger approach=20 :-)

The = difference between 1=20 and 2 will have to be controlled by a cowl flap. A thermostat or = EWP=20 controller will take care of the water temp for number 3. I'm not = sure how=20 to keep the oil temp up though. What do you guys see for oil = temps in=20 descents? Mine plunges to 120-130F. Maybe a cowl flap that's = really=20 restrictive could handle number 3 as well. =20

Back to = the drawing=20 board. I need a really great cowl flap. =20

Rusty = (finding out in a=20 few minutes if I have to drive to Greenville, SC tomorrow for a 30 = minute=20 job...groan)

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