X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=eqSd9chX c=1 sm=1 tr=0 a=P+YvP7MoOanUyctSstwofA==:117 a=x7bEGLp0ZPQA:10 a=xXDCcK6TKBsA:10 a=Kd1tUaAdevIA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=7g1VtSJxAAAA:8 a=NhvbQeJT1Jw1GacnwmwA:9 a=QEXdDO2ut3YA:10 a=FMnVVNC4FTgA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=n7QPQOdQED3hN9VDjB0A:9 a=wiBg5zGnLbvOwqG1:21 a=T_WObCaBjb5lLww25dKY:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Todd Bartrim bartrim@gmail.com" Received: from mail-wm0-f43.google.com ([74.125.82.43] verified) by logan.com (CommuniGate Pro SMTP 6.2.2) with ESMTPS id 11067766 for flyrotary@lancaironline.net; Sun, 29 Apr 2018 02:45:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.43; envelope-from=bartrim@gmail.com Received: by mail-wm0-f43.google.com with SMTP id l1so9341208wmb.2 for ; Sat, 28 Apr 2018 23:45:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=uDT/Gp3Uj1uiN8QnkGGPB4p2CQ7uy8+wxMAAb5CMbfI=; b=mlNQ64YqmCDwYAtMsDmiiRgGnT/n+s7+s2tyzgn2URm2MKSylqWKahRxKl8yO/mu7a P2W1cIMkfJPoK3wIRfA6PgGmXS77NFpyOD2R4GjT80YWVSw8hNnPfkujtCDTRdmXhhuj AsVRVoTcqJ+7ZrmpbG4a9ebY+//fkzghFmKoNIRGkUscY8DAXuZlGkk59pRtthTvxRjy 7fq8Ul6ZZFCiGEcEJloL0mLHTLo9FAm7C+XQM22C0/J2UQCNa0e5GL5mN13yk0p8jPiN mUDNfMpEgSle6ETPUCTZ4CFgoapGWQ5r+sQ7z2Fdi9NkWhtLwM6g5YFiVQvoLVJQTUdM hhIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=uDT/Gp3Uj1uiN8QnkGGPB4p2CQ7uy8+wxMAAb5CMbfI=; b=MtoJw5PVDor8LoFj2YdlgkVffbL0HhEMm7XFu+V5UnXaO65aEt0Hm6IT0Xu9VVVgpj hLjy8n9vzifMVLvgfgqEcIwwj3Isu9mGDruBWWDoC5k0xSjUqcfEbG/8nQHO/UOjIu0L u/Fn8EygLkszvM8vMNmeoNov8SfyQQvqQtc1TAxt56OLSdPHM+cc4751he4ZbwSYSU2Q Mho/axOqEaSKV3ymQEm+kwdVAIiXfBXZMaANw5JFzytebLfWlCosSfWhvKvlPUvVblc+ GYAbqOEXP27Klf2MsSoURC1+PREgBwDFJ0Q2+QN14x5fD+JPBmPwpfNt5PQdvdcs5+FT Ey+w== X-Gm-Message-State: ALQs6tBwxpwj9ORoFD4beG2fJZrFzKWis4OZWqiZPKLAO05FCAEf2jbe 6p2WF1CgDeBU0DD3UqUE9JFy1vn1cja+KWtMlw== X-Google-Smtp-Source: AB8JxZowg1O0N0mETP9Dep4PrAqE+S6ybHHPieuscC5Lm2g/qleXTYENSjmLxCJ339U4Y8DLZPAm5X3SuknJqMgVXuY= X-Received: by 2002:a50:8ced:: with SMTP id r42-v6mr11249295edr.251.1524984304045; Sat, 28 Apr 2018 23:45:04 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Sun, 29 Apr 2018 06:44:53 +0000 Message-ID: Subject: Re: [FlyRotary] Re: Glasair Testing Continued To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000bb14da056af71349" --000000000000bb14da056af71349 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Stephen; Any news for us? I've been expecting a first flight report any day now. Todd On Fri, Mar 23, 2018, 17:16 Stephen Izett stephen.izett@gmail.com, < flyrotary@lancaironline.net> wrote: > > > On 23 Mar 2018, at 10:24 pm, Tracy Crook rwstracy@gmail.com < > flyrotary@lancaironline.net> wrote: > > > > Haven=E2=80=99t had occasion to test the RV-8 this way but on an 85 F d= ay my > 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 > climb out. If I nurse it carefully (minimum climb rate & best cooling > airspeed 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 Micromit= e, just > 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 sof= tware 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 t= he water > 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 < > flyrotary@lancaironline.net> wrote: > > > > > > > > > > > > On Fri, Mar 23, 2018 at 7:35 AM, Stephen Izett stephen.izett@gmail.co= m > wrote: > > > Hi people > > > > > > I know how much I have appreciated data over the years so for those > interested here is some more. > > > Having looked at last weeks test data and the temps looking like they > were close to stabilised after reaching around 212F I thought I would ris= k > 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 ~20-37knots > > > 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 > > > > > > I=E2=80=99m wondering what a 30row oil cooler like Tracy uses might d= o 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 pressure differential data on a > Mazda cooler. He was seeing a really large oil pressure drop across the > cooler, indicating highly restricted flow through it. Less flow=3Dless > cooling. Have you measured oil pressures on the inlet and outlet? > > > > > > As Tracy has mentioned in the past, short bursts of power won't reall= y > tell you much relative to sustained high power. Too many variables: > inconsistent heat input, and inconsistent air flow for cooling (varying > speeds). Since you have a controllable prop, have you tried tying the pla= ne > down & doing a sustained run at, say, 75% power? Surely the plane would g= et > off the ground using 75% power, so if you can cool with static (only the > prop) airflow into your heat exchangers, flying speeds will only help wi= th > cooling mass flow through the coolers. > > > > > > Are you the one using a Maximite to gather your data? If so, would yo= u > be willing to share your code? I can handle most things electronic, but I= 'm > not any kind of coder at all. :-) > > > > > > Charlie > > > > > > Virus-free. www.avast.com > > > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --000000000000bb14da056af71349 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Stephen;
=C2=A0 =C2=A0 =C2=A0 Any news for us? I've been expecti= ng a first flight report any day now.

Todd=C2=A0

On Fri,= Mar 23, 2018, 17:16 Stephen Izett stephen.izett@gmail.com, <flyrotary@lancaironline.net> wrote:

> On 23 Mar 2018, at 10:24 pm, Tracy Crook rwstracy@gmail.com <flyrotary@lancaironline.net= > wrote:
>
> 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 about 224F (oil and gas) while taxiin= g and stabilize there.=C2=A0 This does not harm the engine at all.=C2=A0 Bu= t if I were to start a takeoff roll at that temp the coolant will boil duri= ng a normal climb out.=C2=A0 If I nurse it carefully (minimum climb rate &a= mp; best cooling airspeed of 125 mph) it will start cooling down before boi= ling.=C2=A0 Never gotten into a situation where this was an operational pro= blem.
>
> 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 Micromi= te, just 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 co= olers and cowl etc but haven=E2=80=99t finished the hardware or the softwar= e at this point.
>
> We will tie it to a tree in the next few weeks so I can check to mixtu= res.
> 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. 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 <flyrotary@lancair= online.net> wrote:
> >
> >
> >
> > On Fri, Mar 23, 2018 at 7:35 AM, Stephen Izett stephen.izett@gmail.com <= flyrotary@= lancaironline.net> wrote:
> > Hi people
> >
> > I know how much I have appreciated data over the years so for tho= se interested here is some more.
> > Having looked at last weeks test data and the temps looking 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 (w= ithin <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 ~20-37knots
> > 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
> >
> > I=E2=80=99m wondering what a 30row oil cooler like Tracy uses mig= ht 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 pressure differential data on = a Mazda cooler. He was seeing a really large oil pressure drop across the c= ooler, indicating highly restricted flow through it. Less flow=3Dless cooli= ng. Have you measured oil pressures on the inlet and outlet?
> >
> > As Tracy has mentioned in the past, short bursts of power won'= ;t really tell you much relative to sustained high power. Too many variable= s: inconsistent heat 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 woul= d get off the ground 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, woul= d you be willing to share your code? I can handle most things electronic, b= ut I'm not any kind of coder at all. :-)
> >
> > Charlie
> >
> >=C2=A0 =C2=A0 =C2=A0 Virus-free. www.avast.com
>
>
> --
> Homepage:=C2=A0 http://www.flyrotary.com/
> Archive and UnSub:=C2=A0 =C2=A0http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html


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