X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from web81004.mail.mud.yahoo.com ([68.142.199.84] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with SMTP id 1232226 for flyrotary@lancaironline.net; Tue, 11 Jul 2006 08:52:38 -0400 Received-SPF: none receiver=logan.com; client-ip=68.142.199.84; envelope-from=deltaflyer@prodigy.net Received: (qmail 71643 invoked by uid 60001); 11 Jul 2006 12:51:53 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=prodigy.net; h=Message-ID:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=euh2NTc5g+xYM/72/5AuQrOUG2L8GoUeaQoC9sAUBNj8XU+dxy0VnF5c37SGnm9N7h1g0qG3an8zvhw+uQ2FjNLR70i/f9u/NrHMagRC+J19q0ThSvuTfsBr7z+IAHJCHCWGMZNYCv5V5Fe59iuzWWChJl8qyXuNUjpuR/zE5vY= ; Message-ID: <20060711125153.71641.qmail@web81004.mail.mud.yahoo.com> Received: from [199.231.49.128] by web81004.mail.mud.yahoo.com via HTTP; Tue, 11 Jul 2006 05:51:53 PDT Date: Tue, 11 Jul 2006 05:51:53 -0700 (PDT) From: James Maher Subject: Re: [FlyRotary] Re: Temperature control To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-306342443-1152622313=:70339" Content-Transfer-Encoding: 8bit --0-306342443-1152622313=:70339 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Kelly, I have seen 5580 RPM max static with the IVO at about 60" pitch setting. The static RPM drops down to about 5330 with the prop in the mid range of 75". Jim Kelly Troyer wrote: SNIP 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) --0-306342443-1152622313=:70339 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit
Kelly,
I have seen 5580 RPM max static with the IVO at about 60" pitch setting.
The static RPM drops down to about 5330 with the prop in the mid range of 75".
Jim

Kelly Troyer <keltro@att.net> wrote:
SNIP
 
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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