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Date: Mon, 21 Sep 2009 16:24:28 -0500
Message-ID: <5cf132c0909211424g36d1a964ocf420b04973ec9b9@mail.gmail.com>
Subject: Re: [FlyRotary] Progress report from Houston
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Kelly,

Yes, I TIG welded them to the inner liner, then used PL's sealing plates and
Ultra Grey RTV to seal off the coolant.  I plan to pressure test them prior
to assembly.

Mark

On Mon, Sep 21, 2009 at 2:41 PM, Kelly Troyer <keltro@att.net> wrote:

>  Mark,
>   Have you made any decisions on the retension/sealing method for your 20B
> "P" port inserts ??
> --
> Kelly Troyer
> "Dyke Delta"_13B ROTARY Engine
> "RWS"_RD1C/EC2/EM2
> "Mistral"_Backplate/Oil Manifold
>
> -------------- Original message from Mark Steitle <msteitle@gmail.com>:
> --------------
>
> Bill,
>
> I'm not sure what's changed, but my oil temps are up from what I reported
> earlier.  I routinely see 220-225 on climbout, then they settle down to 200
> in cruise.  Maybe I'm producing more hp now, or maybe the earlier
> temperature report was not in mid-summer, or possibly my system is not
> cooling as well as it did earlier.  I'm just glad that I installed TES
> o-rings throughout.
> My cowl flap initially had an aluminum lip, that protruded into the
> airstream about 1".  This was a quick and dirty test to see the result.  I
> couldn't open or close it, it was open all the time.  I have since replaced
> the 1" lip with a servo-controlled door so I can open/close as desired.
> When closed it is the same as a stock cowl.  This is very helpful in cooler
> climates, not so much during triple-digit Texas summer months.
>
> I also added an "airfoil shaped" piece on the firewall directly above the
> cowl flap opening.  This was done in the hope of helping coax the heated air
> out of the cowl.  But I didn't detect any great improvement in cooling.  Oh,
> well.  Next thing I plan on adding is small air dams on each end of the flap
> door.  The idea here is to promote more efficient airflow out of the cowl
> flap.  I've heard that these make a big difference.  We'll see.
> If you are considering installing a cowl flap, you may want to consider
> locating it on the side, or possibly install one on each side, back near the
> firewall.  This would allow you to make the opening larger, and this
> location may be in a lower pressure area than the bottom, especially during
> climbout.  Just a thought.
>
> Cooling is still marginal in the Texas heat, and it will be worse with the
> new P-port 20B engine.  So, I may be forced to make some major changes to
> get the more powerful engine to cool, or else be forced to throttle back
> during climbout.  I've been considering relocating the radiator from under
> the engine to the cool side of the engine (fore/aft).  This would allow me
> to use a slightly larger radiator.  It would clean up the plumbing and
> significantly shorten the cooling lines too.
> No, I haven't experienced SAG.  But then I'm running Renesis type irridium
> spark plugs.  I'm at 143 hours now.  Personally, I won't use anything else.
>
>
> Mark
>
>
>

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<div>Kelly,</div>
<div>=A0</div>
<div>Yes, I TIG welded them to the inner liner, then used PL&#39;s sealing =
plates and Ultra Grey RTV to seal off the coolant.=A0 I plan to=A0pressure =
test them prior to assembly.</div>
<div>=A0</div>
<div>Mark<br><br></div>
<div class=3D"gmail_quote">On Mon, Sep 21, 2009 at 2:41 PM, Kelly Troyer <s=
pan dir=3D"ltr">&lt;<a href=3D"mailto:keltro@att.net">keltro@att.net</a>&gt=
;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>
<div></div>
<div>Mark,</div>
<div>=A0 Have you made any decisions on the retension/sealing method for yo=
ur 20B &quot;P&quot; port inserts ??</div>
<div>--<br>Kelly Troyer <br>&quot;Dyke Delta&quot;_13B ROTARY Engine <br>&q=
uot;RWS&quot;_RD1C/EC2/EM2 <br>&quot;Mistral&quot;_Backplate/Oil Manifold <=
/div>
<blockquote style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #101=
0ff 2px solid">-------------- Original message from Mark Steitle &lt;<a hre=
f=3D"mailto:msteitle@gmail.com" target=3D"_blank">msteitle@gmail.com</a>&gt=
;: -------------- <br>
<br>
<div>Bill, </div>
<div>=A0</div>
<div>I&#39;m not sure what&#39;s changed, but my oil temps are up from what=
 I reported earlier.=A0 I routinely see 220-225 on climbout, then they sett=
le down to 200 in cruise.=A0 Maybe I&#39;m producing more hp now, or maybe =
the earlier temperature report was not in mid-summer, or possibly my system=
 is not cooling as well as it did earlier.=A0 I&#39;m just glad that I=A0in=
stalled TES o-rings throughout.=A0 <br>
</div>
<div>My cowl flap initially had an aluminum lip, that=A0protruded into the =
airstream=A0about 1&quot;.=A0 This was a quick and dirty test to see the re=
sult.=A0=A0I couldn&#39;t open or close it, it was open all the time.=A0 I =
have since replaced the 1&quot; lip with a servo-controlled=A0door so I can=
 open/close as desired.=A0 When closed it is the same as a stock cowl.=A0 T=
his is very helpful in cooler climates, not so much during triple-digit Tex=
as summer months.</div>

<div>=A0</div>
<div>I also added an &quot;airfoil shaped&quot; piece on the firewall direc=
tly above the cowl flap opening.=A0 This was done=A0in the hope=A0of helpin=
g coax=A0the heated air out of=A0the cowl.=A0 But I didn&#39;t detect any g=
reat improvement in cooling.=A0 Oh, well.=A0=A0Next thing I plan on adding =
is small air dams on each end of the flap door.=A0 The idea here is to prom=
ote more efficient airflow out of the cowl flap.=A0 I&#39;ve heard that the=
se make a big difference.=A0 We&#39;ll see.=A0=A0=20
<div>=A0</div></div>
<div>If you are considering installing a cowl flap, you may want to conside=
r locating=A0it on the side, or=A0possibly install one on=A0each side, back=
 near the firewall.=A0 This would allow you to make=A0the opening=A0larger,=
 and this location=A0may=A0be=A0in a lower pressure area than=A0the bottom,=
 especially during climbout.=A0 Just a thought.</div>

<div>=A0</div>
<div>Cooling is still marginal in the Texas=A0heat, and=A0it will be worse =
with=A0the new P-port 20B engine.=A0 So, I may be forced to make some major=
 changes to get the more powerful=A0engine to cool, or else be forced to th=
rottle back during climbout.=A0 I&#39;ve=A0been considering=A0relocating th=
e radiator from under the engine to=A0the cool side of the engine (fore/aft=
).=A0 This would allow me to use a slightly larger radiator.=A0 It would cl=
ean up the plumbing and significantly shorten the cooling lines too.=A0=A0=
=A0<br>
</div>
<div>No, I haven&#39;t experienced SAG.=A0 But then I&#39;m running Renesis=
 type irridium spark plugs.=A0 I&#39;m at 143 hours now.=A0 Personally, I w=
on&#39;t use anything else.=A0 </div>
<div>=A0</div>
<div>Mark</div>
<div>=A0</div></blockquote></div></blockquote></div><br>

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