From: "Todd Bartrim bartrim@gmail.com" <flyrotary@lancaironline.net>
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Date: Fri, 8 Jun 2018 00:45:36 -0700
Message-ID: <CALYfWBszL9GThvJ8MJ1z6SzZPSMTPn+RM+iuXgkKHbK3BfZqMg@mail.gmail.com>
Subject: Re: [FlyRotary] Re. Rescaling the EM2 to metric
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Andrew;
 I haven't spent much further time on the metric conversion. I think it
wouldn't be as simple as I hoped. It was fairly straight forward to convert
the fuel level to litres and most of the temp measurements should be almost
as easy, but the K & J thermocouples have different raw data, that I don't
believe would be easy to convert. And then some of the calculated
parameters will likely be adversely affected as well. Probably not
impossible, but first, I just don't have the time and second, I would
probably have to be bugging Tracy a lot for info and he's busy being
retired in the mountains of Colorado where he seems to be online only
occasionally.
   I have however longed for a data-logger which the early EM2 didn't have
(I have #003). With the increasing popularity of hobby microcontrollers I
can get a Ardurino microcontrollers for $35 and a datalogger for it for $6,
so I just asked Tracy about the possibility of harvesting data from the EM2=
.
  However for a few other reasons, I'm considering that next time someone
on the list is selling an EM3 from an abandoned project, I might buy it for
an upgrade. I think there was one recently but it was bought up right away.

Todd Bartrim

On Thu, Jun 7, 2018 at 7:58 PM, Andrew Martin andrew@martinag.com.au <
flyrotary@lancaironline.net> wrote:

> Todd, did you ever get the EM2 recalibrated to metric? I never attemped
> this as doing so usually gives me quite a few hours work to get back to a
> working system. I used Tracy=E2=80=99s factory calibration in the EM2 as =
the base
> to calibrate my efis, which is in metric. It is a minor inconvienience to
> do the mental arithmetric when comparing instruments, but would be
> interesting to know if you succeeded.
> --
> Regards Andrew Martin Martin Ag
>

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<div dir=3D"ltr">Hi Andrew;<div>=C2=A0I haven&#39;t spent much further time=
 on the metric conversion. I think it wouldn&#39;t be as simple as I hoped.=
 It was fairly straight forward to convert the fuel level to litres and mos=
t of the temp measurements should be almost as easy, but the K &amp; J ther=
mocouples have different raw data, that I don&#39;t believe would be easy t=
o convert. And then some of the calculated parameters will likely be advers=
ely affected as well. Probably not impossible, but first, I just don&#39;t =
have the time and second, I would probably have to be bugging Tracy a lot f=
or info and he&#39;s busy being retired in the mountains of Colorado where =
he seems to be online only occasionally.</div><div>=C2=A0 =C2=A0I have howe=
ver longed for a data-logger which the early EM2 didn&#39;t have (I have #0=
03). With the increasing popularity of hobby microcontrollers I can get a A=
rdurino microcontrollers for $35 and a datalogger for it for $6, so I just =
asked Tracy about the possibility of harvesting data from the EM2.</div><di=
v>=C2=A0 However for a few other reasons, I&#39;m considering that next tim=
e someone on the list is selling an EM3 from an abandoned project, I might =
buy it for an upgrade. I think there was one recently but it was bought up =
right away.</div></div><div class=3D"gmail_extra"><br clear=3D"all"><div><d=
iv class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D=
"ltr">Todd Bartrim</div></div></div>
<br><div class=3D"gmail_quote">On Thu, Jun 7, 2018 at 7:58 PM, Andrew Marti=
n <a href=3D"mailto:andrew@martinag.com.au">andrew@martinag.com.au</a> <spa=
n dir=3D"ltr">&lt;<a href=3D"mailto:flyrotary@lancaironline.net" target=3D"=
_blank">flyrotary@lancaironline.net</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex"><div dir=3D"auto">Todd, did you ever get the EM2 recalibra=
ted to metric? I never attemped this as doing so usually gives me quite a f=
ew hours work to get back to a working system. I used Tracy=E2=80=99s facto=
ry calibration in the EM2 as the base to calibrate my efis, which is in met=
ric. It is a minor inconvienience to do the mental arithmetric when compari=
ng instruments, but would be interesting to know if you succeeded.</div><sp=
an class=3D"HOEnZb"><font color=3D"#888888">-- <br><div dir=3D"ltr" class=
=3D"m_-8049317604165277803gmail_signature" data-smartmail=3D"gmail_signatur=
e">Regards
Andrew Martin
Martin Ag</div>
</font></span></blockquote></div><br></div>

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