X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-pd0-f170.google.com ([209.85.192.170] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTPS id 6571942 for flyrotary@lancaironline.net; Thu, 31 Oct 2013 13:57:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.170; envelope-from=wdleonard@gmail.com Received: by mail-pd0-f170.google.com with SMTP id v10so2716293pde.15 for ; Thu, 31 Oct 2013 10:57:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=xJCT51XBfcgC8C+Qya7kPn/wuKIToUJgJSvj4I16hPs=; b=ZuQ1hJ7mALbL3YLabttibrp+gIoPrg8SVoA9OV9HCBfZ4S4JfpamSrG+D3sFbAkVS+ mgJiUTP5wLjMsuxoYOn/fYnV3olL4F+1fS5cr67+c4Fn+JqCmrg6zM5rK8rQ8c/eaC0v n9F6uvkMDRn4k3lXS+YP27J8sADWQI62OQJIvsBNuwYLpvzOweai6gcmkAoKrmqJCSY7 xTuQVMUXglf/UYmdZJZye8vSeNs35eRTVwfFAgsI6f7H+RFbDrwagtGr9MKE6vOauQku GQdVWMJ5bzV4xKw1tXPtjZC0f2kPZp26hIezCchS6GKl0cDBE1vywu9zKimJVth9rVOv h5LQ== MIME-Version: 1.0 X-Received: by 10.66.141.165 with SMTP id rp5mr3227199pab.90.1383242226607; Thu, 31 Oct 2013 10:57:06 -0700 (PDT) Received: by 10.70.131.169 with HTTP; Thu, 31 Oct 2013 10:57:06 -0700 (PDT) In-Reply-To: References: Date: Thu, 31 Oct 2013 10:57:06 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Wrong turbo, maybe better this try From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a113312ea8e2e9504ea0d2d4b --001a113312ea8e2e9504ea0d2d4b Content-Type: text/plain; charset=ISO-8859-1 I use a bored out stock turbine housing with a TO4 turbine blade. I am not sure about the A/R but it is far less than optimum but is the only thing that will fit without major modifications. Yes, that is what I raced at Reno and I was still not at WOT. Dave Leonard On Wed, Oct 30, 2013 at 4:58 PM, Kelly Troyer wrote: > Dave, > > What is the A/R ratio of your TO-4E/50 turbine housing??..........My > TO-4E/50 (hope to run in this lifetime) has a 1.15 A/R ratio turbine > housing. Is your > TO-4 what you were running at Reno ??.............. > > Thanks, > > Kelly Troyer > Dyke Delta_"Eventually" > 13B_RD1C_EC2_EM2 > > > On Tue, Oct 29, 2013 at 5:33 PM, David Leonard wrote: > >> 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 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 >>> >>> >> > > > -- > > --001a113312ea8e2e9504ea0d2d4b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
I use a bored out stock turbine housing with a TO4 turbine= blade. =A0I am not sure about the A/R but it is far less than optimum but = is the only thing that will fit without major modifications. =A0Yes, that i= s what I raced at Reno and I was still not at WOT. =A0

Dave Leonard


<= div class=3D"gmail_quote">On Wed, Oct 30, 2013 at 4:58 PM, Kelly Troyer <ke= ltro@gmail.com> wrote:
Dave,

=A0 =A0W= hat is the A/R ratio of your TO-4E/50 turbine housing??..........My TO-4E/5= 0 (hope to run in this lifetime) has a 1.15 A/R ratio turbine housing. Is y= our
TO-4 what you were running at Reno ??..............

Thanks,

Kelly Troyer
Dyke D= elta_"Eventually"
13B_RD1C_EC2_EM2


On Tue, = Oct 29, 2013 at 5:33 PM, David Leonard <wdleonard@gmail.com> wrote:
You are right Scott, that is a much bette= r turbo, though I doubt you were experiencing compressor stall at power set= tings you would want 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 turb= ine housing should be as big as you can reasonably fit.

Dave Leonard


<= div class=3D"gmail_quote">On Tue, Oct 29, 2013 at 2:41 PM, Scott Emery <sh= ipchief@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 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. 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 Fa= rnham 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 le= ft side. The hot jacket water pipe will need to be relocated.

Sent from my iPhone
--
Homepage: =A0http:/= /www.flyrotary.com/
Archive and UnSub: =A0 http://mail.lancaironline.net:81/lists= /flyrotary/List.html





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