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Date: Fri, 20 Jan 2012 18:46:35 -0600
Message-ID: <CAHh3jbPsD7KH65RsWj=vvVkk=TsZ_mJ-ALuqfFjsXEDfcCK7HQ@mail.gmail.com>
Subject: Re: [FlyRotary] Re: P-port breakthrough
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=f46d0442708e1b46ed04b6ff219f

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Tracy,

Thanks, I'll check that, but remember... I've got three of those "suckers"
and they're working overtime.

Mark

On Fri, Jan 20, 2012 at 5:27 PM, Tracy <rwstracy@gmail.com> wrote:

> Sounds like it's working for you but if those check valves are "good" ie,
> don't leak,  the MP won't go up fast enough at the EC2/3 port and the
> engine will probably bog down and die when you open the throttle
> (especially if done rapidly)..   Check your throttle response to be sure
> the EC2/3 sees the true MP when you go to WFO.
>
> Tracy
>
>
>
> On Fri, Jan 20, 2012 at 6:04 PM, Mark Steitle <msteitle@gmail.com> wrote:
>
>> I made a major breakthrough today.  In preparation for hooking up my new
>> Hytek data logger, I decided that it would be a good idea to install check
>> valves in the vacuum lines leading from each rotor housing.  (For those who
>> are unaware, I am running a peripheral port 3-rotor with a slide throttle
>> TB.)  My system measures MAP from the unused oil injection ports in each
>> rotor housing.  Not sure what possessed me to do a ground run right then,
>> but I decided to do a ground run after installing the check valves.  Now
>> keep in mind that typical MAP readings at idle up to this point was approx.
>> 17".  This has been bugging me, but it didn't stop me from flying.  Well,
>> today's MAP readings were in the 14.4" - 15.0" range.  Then it dawned on me
>> that the way the vacuum lines were plumbed the EC-2 would see an average of
>> all three rotors.  Since each rotor is 120* (crank degrees) apart in their
>> 4-stroke cycle, the MAP would be quite a bit different for each rotor.  By
>> installing check valves in the vacuum lines, I have now isolated each rotor
>> from the other two and am measuring the lowest vacuum.  Idle is now down to
>> a respectable 1500 rpm, but the mixture has gone way lean, so it appears
>> that a re-tune is in order.  I'll probably re-set the EC-2 to the factory
>> defaults and start the process over from the very beginning.
>>
>> I would like to strongly suggest to anyone that is measuring MAP in the
>> rotor housings to install check valves in each of the lines.  Your EC-2/3
>> will thank you for it.
>>
>> Mark
>>
>
>

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Tracy,=A0<div><br></div><div>Thanks,=A0I&#39;ll check that, but remember...=
 I&#39;ve got three of those &quot;suckers&quot; and they&#39;re working ov=
ertime.</div><div><br></div><div>Mark =A0<br><br><div class=3D"gmail_quote"=
>On Fri, Jan 20, 2012 at 5:27 PM, Tracy <span dir=3D"ltr">&lt;<a href=3D"ma=
ilto:rwstracy@gmail.com">rwstracy@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Sounds like it&#39;s working for you but if =
those check valves are &quot;good&quot; ie, don&#39;t leak,=A0 the MP won&#=
39;t go up fast enough at the EC2/3 port and the engine will probably bog d=
own and die when you open the throttle (especially if done rapidly)..=A0=A0=
 Check your throttle response to be sure the EC2/3 sees the true MP when yo=
u go to WFO.<span class=3D"HOEnZb"><font color=3D"#888888"><br>

<br>Tracy</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>=A0<br><=
br><div class=3D"gmail_quote">On Fri, Jan 20, 2012 at 6:04 PM, Mark Steitle=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:msteitle@gmail.com" target=3D"_bla=
nk">msteitle@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div>I made a major breakthrough today. =A0In preparation for hooking up my=
 new Hytek data logger, I decided that it would be a good idea to install c=
heck valves in the vacuum lines leading from each rotor housing. =A0(For th=
ose who are unaware, I am running a peripheral port 3-rotor with a slide th=
rottle TB.) =A0My system measures MAP from the unused oil injection ports i=
n each rotor housing. =A0Not sure what possessed me to do a ground run righ=
t then, but I decided to do a ground run after installing the check valves.=
 =A0Now keep in mind that typical MAP readings at idle up to this point was=
 approx. 17&quot;. =A0This has been bugging me, but it didn&#39;t stop me f=
rom flying. =A0Well, today&#39;s MAP readings were in the 14.4&quot; - 15.0=
&quot; range. =A0Then it dawned on me that the way the vacuum lines were pl=
umbed the EC-2 would see an average of all three rotors. =A0Since each roto=
r is 120* (crank degrees) apart in their 4-stroke cycle, the MAP would be q=
uite a bit different for each rotor. =A0By installing check valves in the v=
acuum lines, I have now isolated each rotor from the other two and am measu=
ring the lowest vacuum. =A0Idle is now down to a respectable 1500 rpm, but =
the mixture has gone way lean, so it appears that a re-tune is in order. =
=A0I&#39;ll probably re-set the EC-2 to the factory defaults and start the =
process over from the very beginning. =A0</div>


<div><br></div><div>I would like to strongly suggest to anyone that is meas=
uring MAP in the rotor housings to install check valves in each of the line=
s. =A0Your EC-2/3 will thank you for it. =A0</div><span><font color=3D"#888=
888"><div>

<br>
</div><div>Mark</div>
</font></span></blockquote></div><br>
</div></div></blockquote></div><br></div>

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