Return-Path: Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 548792 for flyrotary@lancaironline.net; Sun, 28 Nov 2004 21:04:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=sqpilot@bellsouth.net Received: from Carol ([216.78.115.1]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with SMTP id <20041129020335.IQGB1994.imf17aec.mail.bellsouth.net@Carol> for ; Sun, 28 Nov 2004 21:03:35 -0500 Message-ID: <009901c4d5b7$9c0cc2f0$01734ed8@Carol> From: "paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] high oil temps must end Date: Sun, 28 Nov 2004 20:03:23 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0096_01C4D585.50B396D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0096_01C4D585.50B396D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Sunday, November 28, 2004 7:10 PM Subject: [FlyRotary] high oil temps must end Greetings, Sorry to hear about Johns most recent problems. I'm already = nominating him for the perseverance award. =20 I tried to go visit Paul today, but only made it about half way before = getting tired of fighting my oil temps. It was only 60 degrees today, = and I climbed at 120 mph, but only made it to 4500 feet before ringing = the bell at 210. I reduced power, and continued a slow climb to 8500 = where I wanted to do some cruise testing, but I couldn't get the oil = temp below 210. At least I thought I could get the temps down once I = leveled out... wrong :-( I finally did a spirited 180, and headed = home to fix this once and for all (I hope). Otherwise, the engine ran = OK. =20 Water temps continue to be just awesome, almost too cool, so I can't = see this being a cowl exit problem. I have to conclude that my current = (poorly shaped) 24 cu in oil scoop is not getting the job done. I = haven't made a final decision, but I think I'll probably do the easiest = thing first, which is to simply increase the size of the current scoop, = without doing much for the shape. At present, the scoop is oval, about = 7" wide by 4" tall. The plan will be to increase it to 7" round, which = will be 38 sq in, and should be way overkill. If this doesn't cool = significantly better, I may have to come to a new conclusion :-) =20 The oil temps were just great with the B drive. The water temps were = even lower than now. For reference, here's an excerpt from my 7-4-04 = log. =20 Finally got a cloud free day, so I climbed to 8000 ft to do some = testing. I climbed at 120 mph, and saw a max of 195 degrees on the oil = temp, and a max of 178 degrees on water. It took 7 minutes, according = to the EM-2 flight timer to get to 8000 ft, which is OK for now. =20 The extra power afforded by the C drive must just be pushing my heat = load beyond what the current oil setup can handle. Stay tuned for more = fiberglass fun. Ed, have you noticed any of this temp increase? Also, what was the = size of your oil inlet again? I know you have a much more ideal duct = shape than I do, which is probably helping quite a bit. At the moment, = I'll settle for brute force cooling if it actually works. Rusty (joining John with my "tired of this" attitude) Hey, Rusty....sorry you couldn't make it to St Elmo, but even more = sorry to hear about your oil temp problem. I have no doubt that you = will solve the problem shortly. I had a terrible time with my cell = phone. I received a message that I had voicemail, but couldn't retrieve = it. Tried at least 50 times, then decided I better forget the phone = while I had that big hammer in my hand. (No need to buy another cell = phone/two-way radio unit). We'll put together a visit soon. Good luck = with the cooling issue. Paul Conner ------=_NextPart_000_0096_01C4D585.50B396D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Sunday, November 28, 2004 = 7:10=20 PM
Subject: [FlyRotary] high oil = temps must=20 end

Greetings,
 
Sorry to hear = about Johns=20 most recent problems.  I'm already nominating him for the = perseverance=20 award. 
 
I tried to go = visit Paul=20 today, but only made it about half way before getting tired of = fighting my oil=20 temps.  It was only 60 degrees today, and I climbed at 120 mph, = but only=20 made it to 4500 feet before ringing the bell at 210.  I reduced = power,=20 and continued a slow climb to 8500 where I wanted to do some cruise = testing,=20 but I couldn't get the oil temp below 210.  At least I thought I = could=20 get the temps down once I leveled out... wrong :-(    I = finally=20 did a spirited 180, and headed home to fix this once and for all (I=20 hope).  Otherwise, the engine ran = OK.  
 
Water temps = continue to=20 be just awesome, almost too cool, so I can't see this being a cowl = exit=20 problem.  I have to conclude that my current (poorly shaped) 24 = cu in oil=20 scoop is not getting the job done.  I haven't made a final = decision, but=20 I think I'll probably do the easiest thing first, which is to simply = increase=20 the size of the current scoop, without doing much for the shape.  = At=20 present, the scoop is oval, about 7" wide by 4" tall.  The plan = will be=20 to increase it to 7" round, which will be 38 sq in, and = should=20 be way overkill.  If this doesn't cool significantly better, = I may=20 have to come to a new conclusion :-) 
 
The oil temps = were just=20 great with the B drive.  The water temps were even lower than = now. =20 For reference, here's an excerpt from my 7-4-04=20 log.  
 

Finally got a cloud = free day, so I=20 climbed to 8000 ft to do some testing. =20 I climbed at 120 mph, and saw a max of 195 degrees on the oil = temp, and=20 a max of 178 degrees on water.  = It=20 took 7 minutes, according to the EM-2 flight timer to get to 8000 ft, = which is=20 OK for now. =20

 

The extra = power afforded=20 by the C drive must just be pushing my heat load beyond what the = current oil=20 setup can handle.  Stay tuned for more fiberglass=20 fun.
 
Ed, have you = noticed any=20 of this temp increase?  Also, what was the size of your oil inlet = again?  I know you have a much more ideal duct shape than I do, = which is=20 probably helping quite a bit.  At the moment, I'll settle for = brute force=20 cooling if it actually works.
 
Rusty = (joining John with=20 my "tired of this" attitude)
 
 
Hey, = Rusty....sorry you=20 couldn't make it to St Elmo, but even more sorry to hear about your = oil temp=20 problem.  I have no doubt that you will solve the problem = shortly. =20 I had a terrible time with my cell phone. I received a message that I = had=20 voicemail, but couldn't retrieve it. Tried at least 50 times, then = decided I=20 better forget the phone while I had that big hammer in my hand. (No = need to=20 buy another cell phone/two-way radio unit).  We'll put together a = visit=20 soon.  Good luck with the cooling issue.  Paul=20 Conner
 
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