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Date: Fri, 8 May 2009 23:44:27 -0400
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Message-ID: <1b4b137c0905082044s52f3d0c3h66bb693e91b9bbc0@mail.gmail.com>
Subject: Re: [FlyRotary] Initial Tuning at Low RPM - surging?
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Large changes in the MAP table values can do that but you did not say at
what point in the tuning procedure this turned up.  What have you done or
tried so far?

Tracy

On Fri, May 8, 2009 at 9:44 PM, Mike Fontenot <
mikef@apexconsultingservices.com> wrote:

> I started up the engine tonight, just to be sure it really worked last
> Tuesday. Started just fine but there was a
> kind of surging of the engine at the lowest RPM. If I increased RPM it
> started to smooth out. Also increasing the mixture
> helped a little, but not a lot.
>
> My question is: is this surging at low RPM indicative of something specific
> (too lean/rich mixture, injectors not
> putting out too little/much).  Something like that?  I am just trying to
> get a feel for any general rule when running in that
> manner.  And if there is no consistency, that's good to know as well.
>
> Thanks,
>
> --
> Mike
>
> ================================
> Mike Fontenot
> Apex Consulting & Services LLC
> Lakewood, Colorado
> 303 / 731-6645
> mikef AT apexconsultingservices DOT com
> ================================
>

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Large changes in the MAP table values can do that but you did not say at wh=
at point in the tuning procedure this turned up.=A0 What have you done or t=
ried so far?<br><br>Tracy<br><br><div class=3D"gmail_quote">On Fri, May 8, =
2009 at 9:44 PM, Mike Fontenot <span dir=3D"ltr">&lt;<a href=3D"mailto:mike=
f@apexconsultingservices.com">mikef@apexconsultingservices.com</a>&gt;</spa=
n> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I started up the =
engine tonight, just to be sure it really worked last Tuesday. Started just=
 fine but there was a <br>
kind of surging of the engine at the lowest RPM. If I increased RPM it star=
ted to smooth out. Also increasing the mixture<br>
helped a little, but not a lot.<br><br>My question is: is this surging at l=
ow RPM indicative of something specific (too lean/rich mixture, injectors n=
ot<br>putting out too little/much).=A0 Something like that?=A0 I am just tr=
ying to get a feel for any general rule when running in that<br>

manner.=A0 And if there is no consistency, that&#39;s good to know as well.=
<br><br>Thanks,<br clear=3D"all"><br>-- <br>Mike<br><br>=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D<br><font color=3D"#888888">Mike Fontenot<br>Apex Consulting &amp; Servi=
ces LLC<br>
Lakewood, Colorado<br>
303 / 731-6645<br>mikef AT apexconsultingservices DOT com<br>=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D<br>
</font></blockquote></div><br>

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