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Date: Tue, 29 Oct 2013 15:33:03 -0700
Message-ID: <CAOFHbnr_-aaQ87Wfy8dKk9QykvKO-qk7gZUpHp+65wS9-myQ3w@mail.gmail.com>
Subject: Re: [FlyRotary] Wrong turbo, maybe better this try
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=047d7b6741eabcdb0204e9e8cc2b

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You are right Scott, that is a much better turbo, though I doubt you were
experiencing compressor stall at power settings you would want to use on
the ground.  I also fly with the TO4E-50, but have used the 60-1 in the
past with good success.  And yes, your turbine housing should be as big as
you can reasonably fit.

Dave Leonard


On Tue, Oct 29, 2013 at 2:41 PM, Scott Emery <shipchief@aol.com> wrote:

>
>
>
>
> Here is a pic of my 13BT powered RV-8. I've already blown & rebuilt the
> engine, now I've learned from ground running and forums that the 60-1 turbo
> with .81 A/R housing was not good in 2 ways: the compressor was too large
> and the turbine housing too small. The resultant increase in exhaust Back
> pressure rising too rapidly with boost pressure. This held back any
> hoped-for power gain. Also, the compressor seems to have been on the verge
> of stall, with fluctuating boost pressure during tethered power testing.
> The pictured TO-4E has a 50 trim compressor & 1.30 A/R turbine house. I
> did run it briefly before I had to return to work, it ran very lean. I'll
> be reprogramming the EC-2 during the next run. This forum & Ross Farnham
> over on the Vansairforce were big helps getting me researching in the right
> direction.
> Possible future intercooler location is along the Charge Air pipe on the
> left side. The hot jacket water pipe will need to be relocated.
>
> Sent from my iPhone
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>

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<div dir=3D"ltr">You are right Scott, that is a much better turbo, though I=
 doubt you were experiencing compressor stall at power settings you would w=
ant to use on the ground. =A0I also fly with the TO4E-50, but have used the=
 60-1 in the past with good success. =A0And yes, your turbine housing shoul=
d be as big as you can reasonably fit.<div>
<br></div><div>Dave Leonard</div></div><div class=3D"gmail_extra"><br><br><=
div class=3D"gmail_quote">On Tue, Oct 29, 2013 at 2:41 PM, Scott Emery <spa=
n dir=3D"ltr">&lt;<a href=3D"mailto:shipchief@aol.com" target=3D"_blank">sh=
ipchief@aol.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"><br>
<br>
<br><br>
Here is a pic of my 13BT powered RV-8. I&#39;ve already blown &amp; rebuilt=
 the engine, now I&#39;ve learned from ground running and forums that the 6=
0-1 turbo with .81 A/R housing was not good in 2 ways: the compressor was t=
oo large and the turbine housing too small. The resultant increase in exhau=
st Back pressure rising too rapidly with boost pressure. This held back any=
 hoped-for power gain. Also, the compressor seems to have been on the verge=
 of stall, with fluctuating boost pressure during tethered power testing.<b=
r>

The pictured TO-4E has a 50 trim compressor &amp; 1.30 A/R turbine house. I=
 did run it briefly before I had to return to work, it ran very lean. I&#39=
;ll be reprogramming the EC-2 during the next run. This forum &amp; Ross Fa=
rnham over on the Vansairforce were big helps getting me researching in the=
 right direction.<br>

Possible future intercooler location is along the Charge Air pipe on the le=
ft side. The hot jacket water pipe will need to be relocated.<br>
<br>
Sent from my iPhone<br>--<br>
Homepage: =A0<a href=3D"http://www.flyrotary.com/" target=3D"_blank">http:/=
/www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:81/lists=
/flyrotary/List.html</a><br>
<br></blockquote></div><br></div>

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