From: "Andrew Martin" <flyrotary@lancaironline.net>
Received-SPF: none
 receiver=logan.com; client-ip=209.85.212.170; envelope-from=andrew@martinag.com.au
MIME-Version: 1.0
In-Reply-To: <CAJxaVD00Fq-84ANZskp58xDfZZqSwa66gj3E4SWkO=tUJciVSw@mail.gmail.com>
References: <CAJxaVD00Fq-84ANZskp58xDfZZqSwa66gj3E4SWkO=tUJciVSw@mail.gmail.com>
Date: Sun, 28 Jun 2015 14:52:09 +0800
Message-ID: <CAJxaVD3pxeqAtsDAvpNbttGw2sY6zJYhwsMSdtbn0Ta1tnBMhg@mail.gmail.com>
Subject: West Aussie Rotary
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=f46d043bdf747ea67a05198e6916

--f46d043bdf747ea67a05198e6916
Content-Type: text/plain; charset=UTF-8

Take 2 without photo

Hi All
>
> Over the last 6 weeks I've got my plane to the airport, assembled &
> running.  Now wouldn't it be great if it was just that easy.
>
> Firstly I found when trying to start the engine, it didn't want to start,
> everything made right noises but 0 fuel, I mean absolutely no fuel would
> flow through any of the injectors, which annoyed me as they only had about
> 10 min running time from a couple of years ago. Got them cleaned & all good.
>
> Almost every day since I've been trying to tune this thing. Seems easy
> enough after re reading Tracy's manuals a couple more times, in practice
> has been a bit of a pain, at each start it seems previous fuel map settings
> were wrong, today I think I may have found the issue.
> Fuel could be pooling in the intake runners at low rpm then creating a
> rich situation as it is consumed. My intake runners are fairly short at
> about 12", from the flange they are angled down about 1 dia then turn
> up into the bottom of the plenum extending to the top. I thought this would
> be ok as at flight rpm should be enough airflow to keep the fuel moving,
> just to get to flight rpm!
>
> Have managed some high rpm runs after tying the plane down, get to about
> 7200rpm before oil temp and blistering paint on the cowl stops play pretty
> quick. Seems to happen too quick to write down all temps & pressures but
> coolant seems to max out at about 180 oil just keeps climbing at anything
> more than about 4000 rpm but can get it below 200 after idling.
>
> So me thinks, need to set higher minimum pitch on prop, maybe a oil to
> coolant heat exchanger, maybe something similar to what Tracy done early
> on, in the oil pan on his rv4. Some heat shielding on cowl, Then wait until
> all pooled fuel is gone each time before trying to tune.
>
> Engine is a 4 port Renesis, heat exchangers are against the firewall with
> cool air ducted from just under the spinner, under the motor then up the
> firewall. hot air exits on top front of cowl. Other than the oil temp seems
> to work quite well, heat exchangers share air but coolant one might be
> getting more than it should.
>
> Fun times.
>
> Andrew
>


-- 
Regards
Andrew Martin
Martin Ag

--f46d043bdf747ea67a05198e6916
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<br><br>Take 2 without photo<div><br><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi All<=
div><br></div><div>Over the last 6 weeks I&#39;ve got my plane to the airpo=
rt, assembled &amp; running.=C2=A0 Now wouldn&#39;t it be great if it was j=
ust that easy.</div><div><br></div><div>Firstly I found when trying to star=
t the engine, it didn&#39;t want to start, everything made right noises but=
 0 fuel, I mean absolutely no fuel would flow through any of the injectors,=
 which annoyed me as they only had=C2=A0about 10 min running time from a co=
uple of years ago. Got them cleaned &amp; all good.</div><div><br></div><di=
v>Almost every day since I&#39;ve been trying to tune this thing. Seems eas=
y enough after re reading Tracy&#39;s manuals a couple more times, in pract=
ice has been a bit of a pain, at each start it seems previous fuel=C2=A0map=
 settings were wrong, today I think I may have found the issue.</div><div>F=
uel could be pooling in the intake runners=C2=A0at low rpm then creating a =
rich situation as it is consumed. My intake runners are fairly short at abo=
ut 12&quot;, from the flange they are angled down about 1 dia then turn up=
=C2=A0into the bottom of the plenum extending to the top. I thought this wo=
uld be ok as at flight rpm should be enough airflow to keep the fuel moving=
, just to get to flight rpm!</div><div><br></div><div>Have managed some hig=
h=C2=A0rpm runs=C2=A0after tying the plane down,=C2=A0get to=C2=A0about 720=
0rpm before oil temp and blistering paint on the cowl stops play pretty qui=
ck. Seems to happen too quick to write down all temps &amp; pressures but c=
oolant seems to max out at about 180 oil just keeps climbing at anything mo=
re than about 4000 rpm but can get it below 200 after idling.</div><div><br=
></div><div>So me thinks, need to set higher minimum pitch on prop, maybe a=
 oil to coolant heat exchanger, maybe something similar to what Tracy done =
early on,=C2=A0in the oil pan=C2=A0on his rv4. Some heat shielding on cowl,=
=C2=A0Then wait until all pooled fuel is gone each time=C2=A0before trying =
to tune.</div><div><br></div><div>Engine is a 4 port Renesis, heat exchange=
rs are against the firewall with cool air ducted from just under the spinne=
r, under the motor then up the firewall.=C2=A0hot air exits on top front of=
 cowl. Other than the oil temp seems to work quite well, heat exchangers=C2=
=A0share air but coolant one might be getting more than it should.</div><di=
v><br></div><div>Fun times.</div><div><br></div><div>Andrew</div>
</blockquote></div><br><br>-- <br>Regards<br>Andrew Martin<br>Martin Ag<br>

--f46d043bdf747ea67a05198e6916--