X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1231529 for flyrotary@lancaironline.net; Mon, 10 Jul 2006 18:50:01 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.115; envelope-from=keltro@att.net Received: from mwebmail24.att.net ([204.127.135.63]) by worldnet.att.net (mtiwmhc11) with SMTP id <20060710224911111004b7g4e>; Mon, 10 Jul 2006 22:49:17 +0000 Received: from [63.157.243.206] by mwebmail24.att.net; Mon, 10 Jul 2006 22:49:11 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Temperature control Date: Mon, 10 Jul 2006 22:49:11 +0000 Message-Id: <071020062249.28553.44B2D96500007D4600006F892160376223019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 28 2006) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_28553_1152571751_0" --NextPart_Webmail_9m3u9jl4l_28553_1152571751_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Jim, Dump the thermostat and do not expect it to cool for long periods of time on the ground during taxi at higher RPM's.........The proof of your cooling system will show up in flight at 120 mph + and climbing........ Do not forget to plug the thermostat bypass opening in your waterpump housing with a 1/2 inch allen wrenching pipe plug........Switching to pure water is not a good idea........By the way what max static rpm are you getting with the "IVO"..........IMHO -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from James Maher : -------------- The setup: · Engine/Model/Year: 13B 6 port NA mixed · Source Condition: David Atkins Rebuilt for Aviation Application · Modifications: Ported intakes and cooling for 180HP · Intake: Atkins short manifold w/TWM 48mm Throttle body · Exhaust: 321 SS tangential muffler · Engine Control: RWS EC2 · Fuel Control: 4 Mazda 460cc Injectors, pri. in block & sec in manifold · Fuel Pumps: RWS · Cooling System: 2 – 9”x13”GM evaporator cores with 0.75” auto hose, stock water pump with 180F deg.-thermostat, 50/50 glycol\water mix. · Oil System: stock 1986 oil cooler · Installation: conventional – self built mount · PSRU/Re-Drive: Ross 2.85:1 · Prop: IVO Magnum 74" 45-105”pitch in-flight adjustable · Power: 180HP? The issue: On the ground, cooling stabilizes at 180-190F deg and oil is usually 10 degrees below the cooling with an OAT of 65-70F deg. When running with higher OAT (75-85F deg) after about 0.5 hours of moderate taxi runs (up to 4300RPM) the cooling temps reach 212Fdeg with the oil about 200F deg. The question: Can something be done to get lower operating temperatures without redesigning the system? Would switching to pure water help and if so by how much? Would removing the thermostat help and if so by how much? How much change should I expect if I were to do both? You guys down south should have a good idea of how best to enhance cooling. What are your suggestions? Thanks, Jim Maher(Dyke Delta) --NextPart_Webmail_9m3u9jl4l_28553_1152571751_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Jim,
  Dump the thermostat and do not expect it to cool for long periods of
time on the ground during taxi at higher RPM's.........The proof of your
cooling system will show up in flight at 120 mph + and climbing........
 Do not forget to plug the thermostat bypass opening in your waterpump
housing with a 1/2 inch allen wrenching pipe plug........Switching to pure
water is not a good idea........By the way what max static rpm are you
getting with the "IVO"..........IMHO 
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from James Maher <deltaflyer@prodigy.net>: --------------

The setup:
·        Engine/Model/Year: 13B 6 port NA mixed
·        Source Condition: David Atkins Rebuilt for Aviation Application 
·        Modifications: Ported intakes and cooling for 180HP
·        Intake: Atkins short manifold w/TWM 48mm Throttle body
·        Exhaust: 321 SS tangential muffler
·        Engine Control: RWS EC2
·        Fuel Control: 4 Mazda 460cc Injectors, pri. in block & sec in manifold
·        Fuel Pumps: RWS
·        Cooling System: 2 – 9”x13”GM evaporator cores with 0.75” auto hose, stock water pump with 180F deg.-thermostat, 50/50 glycol\water mix.
·        Oil System: stock 1986 oil cooler
·        Installation: conventional – self built mount
·        PSRU/Re-Drive: Ross 2.85:1
·        Prop: IVO Magnum 74" 45-105”pitch in-flight adjustable
·        Power: 180HP? 
 
The issue:
On the ground, cooling stabilizes at 180-190F deg and oil is usually 10 degrees below the cooling with an OAT of 65-70F deg.
When running with higher OAT (75-85F deg) after about 0.5 hours of moderate taxi runs (up to 4300RPM) the cooling temps reach 212Fdeg with the oil about 200F deg.
 
The question:
Can something be done to get lower operating temperatures without redesigning the system?
Would switching to pure water help and if so by how much?
Would removing the thermostat help and if so by how much?
How much change should I expect if I were to do both?
You guys down south should have a good idea of how best to enhance cooling.
What are your suggestions?
Thanks,
Jim Maher(Dyke Delta)
 
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