X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=L5hfeKb8 c=1 sm=1 tr=0 a=AQZ4pXRFgIsjwRn0Ci6Jog==:117 a=NRKkXcIggJ40GIzpSW/H8Q==:17 a=x7bEGLp0ZPQA:10 a=VqmtQeTB-p0A:10 a=4_-BN3WEXhEA:10 a=v2DPQv5-lfwA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=7g1VtSJxAAAA:8 a=1zHGzOJbIHjEJQMEZGcA:9 a=QEXdDO2ut3YA:10 a=FMnVVNC4FTgA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=CmZ7_KHUhMpIJuex:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 a=T_WObCaBjb5lLww25dKY:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Tracy Crook rwstracy@gmail.com" Received: from mail-yw0-f172.google.com ([209.85.161.172] verified) by logan.com (CommuniGate Pro SMTP 6.2.2) with ESMTPS id 10869160 for flyrotary@lancaironline.net; Fri, 23 Mar 2018 10:24:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.172; envelope-from=rwstracy@gmail.com Received: by mail-yw0-f172.google.com with SMTP id v130so3723488ywa.0 for ; Fri, 23 Mar 2018 07:24:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:mime-version:to:from:subject:date:importance:in-reply-to :references; bh=cAldzdxOvaXr0WknEa6KfFYiK74tJ5KWIWmBd6Onae4=; b=MZBDMxfpKlbLLU5EYYFo7IiPlOrISE2WE26ObJlJbU3IZpEg1FcFfbR/OIgVD9OyCf QIbKQXNFBGRjSnhWhy1Bf7OfN9JlRR18xcat0Gk4Ikjh3GHPfABXypP6oSydk8xqOlp8 Vw/yeUvXNjms/44CQ2A/hitxnHduUJPrhzxKhJHRyzuc/+Y97hTDlAQO6RIADgNpjys3 QM8LGBUyv2Fc9xwoenBMiIUcFyacTOEke6Dh37WofGeNkz/mWGLXemJcZTlCDl0Xrj6Q wj+6BlrK1E3QXDuG9x3aX48O5uwInji8xTD2loR1YFuqbxTwUIqjGbdYpioFI+pLrac/ /rZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:mime-version:to:from:subject:date :importance:in-reply-to:references; bh=cAldzdxOvaXr0WknEa6KfFYiK74tJ5KWIWmBd6Onae4=; b=cOKXfrrECQHSde4hMi9jfl4C34RvtZA5fkfjmLvskkbfsm/c2jode0Pe7Qq9Rc9Vzg NonZbUoUXFSjk59IvgPMwSjH+EIul+5wKmjopzJnYaJKt+gZ2OZd/Q+uaqLaN9+0qCKT quv8ymhdY/wPZh57CR/ygAOVeUzKcEqGESvvk0nmqMz3UrkcgRpUAiDKvMfCeYq3o05w 97ox8lI84gONQ8ujV0J+j6TUX+bS/RHMAwSauCE3i26GfrNmYTc9EYI+nHBJJ5AycJqv v7FqHFxRbciOy1vxcHIglxxf1lXiX5+Ydr2DqecLo881Yqo1tVQ2sgD9KVIyc9RciY8T eC3Q== X-Gm-Message-State: AElRT7F5VFvoeeJS8lIlDMtX+dPz01b49oAhSqwMwUE6iKkYXrJP3j33 EE4LAFQYwlgPZUNWa/HkoDYrH78n X-Google-Smtp-Source: AG47ELuifFbmnaoEPnFjaOcbTCr8HFpoiD3m9aGtqfENH3Zhj+HQ0AgLrZmh8vtlCML/rvyfBNO83g== X-Received: by 10.129.71.68 with SMTP id u65mr17946702ywa.47.1521815075507; Fri, 23 Mar 2018 07:24:35 -0700 (PDT) Return-Path: Received: from ?IPv6:::ffff:192.168.254.69? (h156.33.187.173.dynamic.ip.windstream.net. [173.187.33.156]) by smtp.gmail.com with ESMTPSA id w193sm3477976ywa.110.2018.03.23.07.24.33 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Mar 2018 07:24:34 -0700 (PDT) Message-ID: <5ab50e22.ca49810a.5a177.0d25@mx.google.com> MIME-Version: 1.0 To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Glasair Testing Continued Date: Fri, 23 Mar 2018 10:24:31 -0400 Importance: normal X-Priority: 3 In-Reply-To: References: Content-Type: multipart/alternative; boundary="_BEB6170A-EB1E-4DE4-B68C-5891E5229470_" --_BEB6170A-EB1E-4DE4-B68C-5891E5229470_ Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Haven=E2=80=99t had occasion to test the RV-8 this way but on an 85 F day m= y RV-4 will eventually get up to about 224F (oil and gas) while taxiing and= stabilize there. This does not harm the engine at all. But if I were to = start a takeoff roll at that temp the coolant will boil during a normal cli= mb out. If I nurse it carefully (minimum climb rate & best cooling airspee= d of 125 mph) it will start cooling down before boiling. Never gotten into= a situation where this was an operational problem. Tracy Sent from Mail for Windows 10 From: Stephen Izett stephen.izett@gmail.com Sent: Friday, March 23, 2018 10:05 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Glasair Testing Continued Hi Charlie I do use Maximite, actually these days Geoff=E2=80=99s lattest Micromite, j= ust better in every way. The data is straight out of the Dynon Skyview log. I will be using a micromite to display and log pressures around the coolers= and cowl etc but haven=E2=80=99t finished the hardware or the software at = this point. We will tie it to a tree in the next few weeks so I can check to mixtures. I very much doubt it will keep cool at static, she=E2=80=99ll overheat with= in I recon 4 minutes at WOT. Our prop doesn=E2=80=99t;t have much blade close to the spinner where the w= ater inlet is. The oil inlet is lower and does get better air from the prop= . Steve > On 23 Mar 2018, at 9:20 pm, Charlie England ceengland7@gmail.com wrote: >=20 >=20 >=20 > On Fri, Mar 23, 2018 at 7:35 AM, Stephen Izett stephen.izett@gmail.com wrote: > Hi people >=20 > I know how much I have appreciated data over the years so for those inter= ested here is some more. > Having looked at last weeks test data and the temps looking like they wer= e close to stabilised after reaching around 212F I thought I would risk it = and see what the temps did get to. > The temp senders are calibrated accurately up to boiling point (within <1= F at 212F) but I=E2=80=99m not sure how accurate they are up at 225F. > The graph below is 43minutes of repeatedly (12 times) taxing and then run= ning down our ~1000yard strip at between ~20-37knots > The OAT was 74-77F during this test. > Renesis 4 port RD1C EC3 EM3 Elect Adj Prop > Water cooler is 540in3 (custom dual pass) with inlet of 20in2 > Oil Cooler is 193in3 (mazda rx7 turbo) with inlet of 7.5in2 >=20 > I=E2=80=99m wondering what a 30row oil cooler like Tracy uses might do to= both the oil and water temps. > We will press on and hopefully flight test it as soon as we have it licen= sed. >=20 > Cheers >=20 > Steve Izett >=20 > Hi Steve, >=20 > Steve Boese has posted some of his pressure differential data on a Mazda = cooler. He was seeing a really large oil pressure drop across the cooler, i= ndicating highly restricted flow through it. Less flow=3Dless cooling. Have= you measured oil pressures on the inlet and outlet?=20 >=20 > As Tracy has mentioned in the past, short bursts of power won't really te= ll you much relative to sustained high power. Too many variables: inconsist= ent heat input, and inconsistent air flow for cooling (varying speeds). Sin= ce you have a controllable prop, have you tried tying the plane down & doin= g a sustained run at, say, 75% power? Surely the plane would get off the gr= ound using 75% power, so if you can cool with static (only the prop) airflo= w into your heat exchangers, flying speeds will only help with cooling mas= s flow through the coolers. >=20 > Are you the one using a Maximite to gather your data? If so, would you be= willing to share your code? I can handle most things electronic, but I'm n= ot any kind of coder at all. :-) >=20 > Charlie >=20 > Virus-free. www.avast.com -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.= html --_BEB6170A-EB1E-4DE4-B68C-5891E5229470_ Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"

Haven=E2=80=99t had occasion to test= the RV-8 this way but on an 85 F day my RV-4 will eventually get up to abo= ut 224F (oil and gas) while taxiing and stabilize there.=C2=A0 This does no= t harm the engine at all.=C2=A0 But if I were to start a takeoff roll at th= at temp the coolant will boil during a normal climb out.=C2=A0 If I nurse i= t carefully (minimum climb rate & best cooling airspeed of 125 mph) it = will start cooling down before boiling.=C2=A0 Never gotten into a situation= where this was an operational problem.

 =

Tracy

 

 

=  

Sent from Mail for Windows 10

 

From: Stephen Izett stephen.izett@gmail.com
<= b>Sent: Friday, March 23, 2018 10:05 AM
To: Rotary motors in aircraft
Subject: = [FlyRotary] Re: Glasair Testing Continued

 

Hi Charlie

I do use Maximite, actually these days Geoff=E2=80=99s lattest Micromite= , just better in every way.

The data is straight ou= t of the Dynon Skyview log.

I will be using a micro= mite to display and log pressures around the coolers and cowl etc but haven= =E2=80=99t finished the hardware or the software at this point.

 

We will tie it to a = tree in the next few weeks so I can check to mixtures.

I very much doubt it will keep cool at static, she=E2=80=99ll overheat = within I recon 4 minutes at WOT.

Our prop doesn=E2= =80=99t;t have much blade close to the spinner where the water inlet is. Th= e oil inlet is lower and does get better air from the prop.

 

Steve

 

> On 23 Mar 2018, at 9:2= 0 pm, Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net&= gt; wrote:

>

>

<= p class=3DMsoNormal>>

> On Fri, Mar 23, 2018= at 7:35 AM, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironl= ine.net> wrote:

> Hi people

>

> I know how much I have appreciate= d data over the years so for those interested here is some more.

> Having looked at last weeks test data and the temps look= ing like they were close to stabilised after reaching around 212F I thought= I would risk it and see what the temps did get to.

> The temp senders are calibrated accurately up to boiling point (withi= n <1F at 212F) but I=E2=80=99m not sure how accurate they are up at 225F= .

> The graph below is 43minutes of repeatedly (= 12 times) taxing and then running down our ~1000yard strip at between ~20-3= 7knots

> The OAT was 74-77F during this test.

> Renesis 4 port RD1C EC3 EM3 Elect Adj Prop

> Water cooler is 540in3 (custom dual pass) with inle= t of 20in2

> Oil Cooler is 193in3 (mazda rx7 tur= bo) with inlet of 7.5in2

>

> I=E2=80=99m wondering what a 30row oil cooler like Tracy uses migh= t do to both the oil and water temps.

> We will = press on and hopefully flight test it as soon as we have it licensed.

>

> Cheers

>

> Steve Izett

>

> Hi Steve,

= >

> Steve Boese has posted some of his press= ure differential data on a Mazda cooler. He was seeing a really large oil p= ressure drop across the cooler, indicating highly restricted flow through i= t. Less flow=3Dless cooling. Have you measured oil pressures on the inlet a= nd outlet?

>

> As T= racy has mentioned in the past, short bursts of power won't really tell you= much relative to sustained high power. Too many variables: inconsistent he= at input, and inconsistent air flow for cooling (varying speeds). Since you= have a controllable prop, have you tried tying the plane down & doing = a sustained run at, say, 75% power? Surely the plane would get off the grou= nd using 75% power, so if you can cool with static (only the prop) airflow = into=C2=A0 your heat exchangers, flying speeds will only help with cooling = mass flow through the coolers.

>

> Are you the one using a Maximite to gather your data? If so,= would you be willing to share your code? I can handle most things electron= ic, but I'm not any kind of coder at all. :-)

> =

> Charlie

>

> =C2=A0=C2=A0=C2=A0=C2=A0 Virus-free. www.avast.com

 

 =

--

Homepage:=C2=A0 h= ttp://www.flyrotary.com/

Archive and UnSub:=C2=A0= =C2=A0 http://mail.lancaironline.net:81/lists/flyrotary/List.html

 

= --_BEB6170A-EB1E-4DE4-B68C-5891E5229470_--