Return-Path: Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3139488 for flyrotary@lancaironline.net; Wed, 31 Mar 2004 20:34:31 -0500 Received: from TOSHIBAjhr ([209.215.55.50]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with SMTP id <20040401013430.QAIW1780.imf23aec.mail.bellsouth.net@TOSHIBAjhr> for ; Wed, 31 Mar 2004 20:34:30 -0500 From: "John Slade" To: "Rotary motors in aircraft" Subject: Requesting more thoughts on cooling Date: Wed, 31 Mar 2004 20:34:29 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01C4175F.914819D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C4175F.914819D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit MessageGuys, I'm signed off and ready to fly, but I'm a little concerned about cooling issues. I don't want to melt anything in the first go around the pattern. I'm finding that the engine gets REALLY hot after about 10 - 15 minutes ground running, and I'm wondering if that's to be expected, or if I have a cooling problem. Maybe I should just taxi gently to the runway and launch to get airflow as soon as possible. For example, today I ran it up and down the taxiway for a few minutes at fairly low speeds and around 2500 - 3000rpm. Then I did some static runups (maybe 3800 - 4000 rpm - all the brakes will hold) and some EC2 tuning. Then I did some mode 1 programing at various rpm. During this run I watched the water temp gradually go up until it was over 200 and I shut her down. The oil was still down around 140 - 160. I took the cowl off and found that everything in the engine compartment was HOT. Radiator, oil coolers, hoses, intake, the cowl itself. Apart from giving my cowl a REAL GOOD post cure I dont think I've done any damage, but this doesnt give me a lot of confidence about whether I'll make it around the pattern. The thermostat is now in place, and I get the feeling that I'd be much better without it. Once the engine gets a little hot the water temps seem to "run away" if I'm producing any kind of power. So... to remove the thermostat [3rd gen rew engine] I have to remove the water pump and have the by-pass hole welded shut - right? Do you 13B drivers tend to just taxi out at low rpm then launch? Would your engine overheat if you did a 15 minute medium power runup? I'd appreciate any general thoughts, or comments on how much ground running I should expect to get away with before the temps get too high. Anything else I should check? Regards, John Slade ------=_NextPart_000_0014_01C4175F.914819D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Guys,
I'm signed off and ready to fly, = but I'm a=20 little concerned about cooling issues. I don't want to melt anything in = the=20 first go around the pattern.
 
I'm finding that the engine gets = REALLY hot=20 after about 10 - 15 minutes ground running, and I'm wondering if that's = to be=20 expected, or if I have a cooling problem.  Maybe I should just taxi = gently=20 to the runway and launch to get airflow as soon as=20 possible.
 
For example, today I ran it up and = down the=20 taxiway for a few minutes at fairly low speeds and around 2500 - = 3000rpm. Then I=20 did some static runups (maybe 3800 - 4000 rpm - all the brakes will = hold) and=20 some EC2 tuning. Then I did some mode 1 programing at various rpm. = During=20 this run I watched the water temp gradually go up until = it was=20 over 200 and I shut her down. The oil was still down around 140 - 160. I = took=20 the cowl off and found that everything in the engine compartment was = HOT.=20 Radiator, oil coolers, hoses, intake, the cowl itself. Apart from giving = my cowl=20 a REAL GOOD post cure I dont think I've done any damage, but this doesnt = give me=20 a lot of confidence about whether I'll make it around the=20 pattern.
 
The thermostat is now in place, = and I get the=20 feeling that I'd be much better without it. Once the engine gets a = little hot=20 the water temps seem to "run away" if I'm producing any kind of power. = So... to=20 remove the thermostat [3rd gen rew engine] I have to remove the water = pump and=20 have the by-pass hole welded shut - right?
 
Do you 13B drivers tend to just = taxi out at low=20 rpm then launch? Would your engine overheat if you did a 15 minute = medium power=20 runup? I'd appreciate any general = thoughts, or comments=20 on how much ground running I should expect to get away with before the = temps get=20 too high. Anything else I should=20 check?
 
Regards,
John = Slade
 
 
 
 
 
 
 
------=_NextPart_000_0014_01C4175F.914819D0--