X-Virus-Scanned: clean according to Sophos on Logan.com From: "Stephen Izett" Received: from mail-pd0-f171.google.com ([209.85.192.171] verified) by logan.com (CommuniGate Pro SMTP 6.1c2) with ESMTPS id 7419858 for flyrotary@lancaironline.net; Fri, 16 Jan 2015 01:55:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.171; envelope-from=steveize@gmail.com Received: by mail-pd0-f171.google.com with SMTP id y13so21029723pdi.2 for ; Thu, 15 Jan 2015 22:55:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:message-id:mime-version:subject:date:references :to:in-reply-to; bh=W4FFik3ogE/ljBqn7H0RGcPQ31PckuMsFhc+Po5gl1g=; b=lsDkZ9RMnOTOmPdWX2jS7M02QJaICup2J9Bs3q5NgkRIwNZMQUGV3gRLVsEj5hif+z 2Wo6+be3AKYr1I1c5PAMGiWwrSozWel1fwy5cNPcVr7ERXzLAsmycvrnyfW3oB/SD92B p/V+/X2NRyBckOH+F5I6gUhKT4UjbBlgQntJHr/qcVTZ9qmfebgS3ggvfpST5nr2kkAB TVs4e2dQeA/UmzMCoel6ydD3jIixhMVG3EXlfe2uuo/B/jGCs+J80re6MFwLHiVuHz15 x/lUepEzBp7GhFw5d1NCadU3AL8sO/cXE2ESp29etxKwPz9mL/HD4LfGgh9QWN40/NmN GDEQ== X-Received: by 10.66.97.6 with SMTP id dw6mr19986608pab.114.1421391317742; Thu, 15 Jan 2015 22:55:17 -0800 (PST) Return-Path: Received: from [10.1.1.4] (124-148-124-121.dyn.iinet.net.au. [124.148.124.121]) by mx.google.com with ESMTPSA id nr15sm3120882pdb.73.2015.01.15.22.55.14 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 15 Jan 2015 22:55:16 -0800 (PST) X-Google-Original-From: Stephen Izett Content-Type: multipart/alternative; boundary="Apple-Mail=_05382180-0DBC-42FC-90BC-DE2F2BF27A18" Message-Id: <415F107D-23A4-44E9-8C3C-69928E364389@icloud.com> Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) Subject: Re: [FlyRotary] First time run with Prop Load Date: Fri, 16 Jan 2015 14:55:10 +0800 References: To: Rotary motors in aircraft In-Reply-To: X-Mailer: Apple Mail (2.1993) --Apple-Mail=_05382180-0DBC-42FC-90BC-DE2F2BF27A18 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi Tracy I rechecked the delta=E2=80=99s again a 1500RPM and Ive got approx, 12F = on the oil and 9F on the water. Are you home yet to send me that code for the EM3? Cheers Steve Izett > On 15 Jan 2015, at 10:17 pm, Tracy = wrote: >=20 > Yes, flow rates are very different (about 35 - 40 GMP for the water) = and water has a higher specific Heat (ie, calories per gram per deg F = delta) than oil. So the oil has to have a much higher delta to carry = away the same amount of heat. The lower flow rate just increases that = factor. The oil also does much more of the cooling job in a rotary = than a piston engine. About 1/3 of of the cooling is via the oil. =20 >=20 > Tracy > Sent from my iPad >=20 > On Jan 15, 2015, at 05:47, steve Izett > wrote: >=20 >> Hi Tracy >> Thanks for the data. Any wisdom on why the difference? >> I thought water would transfer heat faster than oil! Are the flow = rates vastly different? >> Thanks again >>=20 >> Steve Izett >>> On 15 Jan 2015, at 5:59 pm, Tracy > wrote: >>>=20 >>> Glad to hear you're making progress Steve. A fixed regulator will = make it harder to adjust for constant mixture across the whole range of = throttle settings but should be possible. I'm only seeing 5-10 degrees = delta on water but 40-50 degrees on oil at cruise power. I think that = is typical. >>>=20 >>> Tracy >>>=20 >>> Sent from my iPad >>>=20 >>>> On Jan 15, 2015, at 04:12, steve Izett > wrote: >>>>=20 >>>> Hi Guys >>>>=20 >>>> I put the prop on the Glasair today and ran it with a load for the = first time! >>>> Smother running and seams to be cooling thus far with 82F OAT. >>>> Again - big thanks Tracy for making this possible. >>>> What pressure do you guys have in your fuel rails, ours is a fixed = regulator. >>>>=20 >>>> I=E2=80=99m in the garage at home so not taking the engine past = 2400 RPM. >>>> Cant wait to get it down to our hangar and run it up properly! >>>>=20 >>>> Do you guys measure in and out of your coolers? >>>> I=E2=80=99m getting a delta of about 13F on the oil cooler and very = little on the water. >>>> Any wisdom, or data? >>>>=20 >>>> Thanks >>>>=20 >>>> Steve Izett >>>> Glasair Super IIRG Renesis 4 port RD1-C EC2 EM3 >>>>=20 >>>> >>>>=20 >>>=20 >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = --Apple-Mail=_05382180-0DBC-42FC-90BC-DE2F2BF27A18 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Hi Tracy

I = rechecked the delta=E2=80=99s again a 1500RPM and Ive got approx, 12F on = the oil and 9F on the water.
Are you home yet to = send me that code for the EM3?

Cheers

Steve Izett
On = 15 Jan 2015, at 10:17 pm, Tracy <flyrotary@lancaironline.net> wrote:

Yes,  flow = rates are very different (about 35 - 40 GMP for the water) and water has = a higher specific Heat (ie, calories per gram per deg F delta) than oil. =  So the oil has to have a much higher delta to carry away the same = amount of heat.  The lower flow rate just increases that factor. =   The oil also does much more of the cooling job in a rotary than a = piston engine.  About 1/3 of of the cooling is via the oil. =  

Tracy
Sent from my = iPad

On Jan 15, 2015, at 05:47, = steve Izett <flyrotary@lancaironline.net> wrote:

Hi Tracy
Thanks for the data. = Any wisdom on why the difference?
I thought water = would transfer heat faster than oil! Are the flow rates vastly = different?
Thanks again

Steve Izett
On 15 = Jan 2015, at 5:59 pm, Tracy <flyrotary@lancaironline.net> wrote:

Glad to hear you're making progress Steve. =  A fixed regulator will make it harder to adjust for constant = mixture across the whole range of throttle settings but should be = possible.  I'm only seeing 5-10 degrees delta on water but 40-50 = degrees on oil at cruise power.  I think that is typical.

Tracy

Sent from my = iPad

On Jan 15, 2015, at 04:12, steve Izett <flyrotary@lancaironline.net> wrote:

Hi Guys

I put the prop on the = Glasair today and ran it with a load for the first time!
Smother running and seams to be cooling thus far with 82F = OAT.
Again - big thanks Tracy for making this possible.
What pressure do you guys have in your fuel rails, ours is a = fixed regulator.

I=E2=80=99m in the garage = at home so not taking the engine past 2400 RPM.
Cant wait = to get it down to our hangar and run it up properly!

Do you guys measure in and out of your coolers?
I=E2=80=99m getting a delta of about 13F on the oil cooler = and very little on the water.
Any wisdom, or data?

Thanks

Steve = Izett
Glasair Super IIRG Renesis 4 port RD1-C EC2 EM3

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