From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Glasair Testing Continued
Date: Sun, 29 Apr 2018 14:55:15 +0800
References: <list-11067754@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-11067754@logan.com>
Message-Id: <9A5E0BEA-4D98-4722-B75A-1260CF7B510C@gmail.com>

Hi there Todd
Sorry, no.=20
Just tidying up some small issues in readiness for licensing.
Trim, Wideband O2, decals etc.
Our daily temps are heading down so I=E2=80=99m hopeful that when ready =
we might get an early morning in the low 50=E2=80=99s F.
This hopefully will give us a little more margin with the cooling.

Hope to provide more data shortly.

Steve Izett


> On 29 Apr 2018, at 2:44 pm, Todd Bartrim bartrim@gmail.com =
<flyrotary@lancaironline.net> wrote:
>=20
> Hi Stephen;
>       Any news for us? I've been expecting a first flight report any =
day now.
>=20
> Todd=20
>=20
> On Fri, Mar 23, 2018, 17:16 Stephen Izett stephen.izett@gmail.com, =
<flyrotary@lancaironline.net> wrote:
>=20
> > 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 =
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 =
Micromite, 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 =
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. 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.com <flyrotary@lancaironline.net> 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 risk it and see what the temps did get to.
> > > The temp senders are calibrated accurately up to boiling point =
(within <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 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 =
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 =
really 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 plane down & doing a sustained run at, say, 75% power? =
Surely the plane would get 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 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 electronic, =
but I'm not any kind of coder at all. :-)
> > >
> > > Charlie
> > >
> > >      Virus-free. www.avast.com
> >
> >
> > --
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>=20
>=20
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