X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f17.google.com ([209.85.221.17] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3475899 for flyrotary@lancaironline.net; Wed, 04 Feb 2009 09:10:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.17; envelope-from=msteitle@gmail.com Received: by qyk10 with SMTP id 10so4716586qyk.19 for ; Wed, 04 Feb 2009 06:10:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=uJIK93vooof1TfKzX9lXYsHIvXRjGSOoUdCqW80wal8=; b=QJor7kHDyi1qt4AnRiva2R8p05jWe965x8VMlmg5B3vroDLS7yQRZta2vjCWK8JfQY /gaz3eBn8ly49aNYr0QPYsKOiBy5B+2PO6nxwxiT59SPpQ66a/pUlJwdpHf0hU7yIVtj ztOhswnb/IZOUNYEAiUA7w773CFo/31rEmp2Q= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=LJeoRwB1mdscBqvrwQKJeX3Mzaj/N2BUi5Ik0Ic/0CakDQbff3O+PNjty/q0KlsaLf sRkOV1o/3qDHUJDxai7LcZIRKH0f2xgQHhmACfkGLoJzmh0BHjw4vcC4VeV0wAHIAZ4I NDN/GgRhNKuJqosegfgw8o1K6Jeh3YpCz12BI= MIME-Version: 1.0 Received: by 10.214.115.16 with SMTP id n16mr10505364qac.104.1233756615892; Wed, 04 Feb 2009 06:10:15 -0800 (PST) In-Reply-To: References: Date: Wed, 4 Feb 2009 08:10:15 -0600 Message-ID: <5cf132c0902040610o3c896b9j75c47f41b8507e68@mail.gmail.com> Subject: Re: [FlyRotary] Re: 20B manifold From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015175caaf6d46038046218588f --0015175caaf6d46038046218588f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Robert, I have one that came with my 20B. I don't want to sound negative, but I don't think it is realistic to use on an a/c. First, it is incredibly heavy because it is designed to incorporate the twin turbos. And it is made of cast iron, so it would probably melt at prolonged WOT operation. And the passages are very restrictive to exhaust flow. I could weigh mine and send some pictures if you wish. Sorry, but I don't want to get rid of it because I have plans for a 3-rotor auto installation where it would be useable. Maybe you could modify a Renesis manifold to fit. It would require some welding, but it is probably more likely to work than the original 20B manifold. The cheapest manifold would be to use 304SS handrail material. I built my first manifold using that material and after 100 hours it looks like it would last for a very long time. Ed Anderson has been using this material on his a/c for a long time. My exhause flange material was 1/2" mild carbon steel and it was holding up fine as it doen'st see the high heat that the pipes do. The problem was with the mufflers. They take a real beating. Try to space the muffler as far away from the engine as possible. Mark S. On Wed, Feb 4, 2009 at 7:43 AM, Rob wrote: > Al and Greg, > Thanks for your replys on this subject. I realize the manifold would be too > heavy but I was hoping I could widdle it down some how. Greg, I would be > interested in your suggestion for doing that. I'm putting this 20B in a > BD-4. > Robert > > Robert Bollinger > MR722 MUM > Fairfield IA 52557 > (641)472-7000 ex2068 > (641)919-3213 cell > rob@mum.edu > > ----- Original Message ----- > *From:* Greg Ward > *To:* Rotary motors in aircraft > *Sent:* Tuesday, February 03, 2009 11:10 PM > *Subject:* [FlyRotary] Re: 20B manifold > > *Al, you don't want the stock exhaust. Get one built. If you want to > know one way it's done, let me know.* > *Greg Ward* > *Lancair 20B in progress* > > ----- Original Message ----- > *From:* Al Gietzen > *To:* Rotary motors in aircraft > *Sent:* Tuesday, February 03, 2009 8:25 PM > *Subject:* [FlyRotary] Re: 20B manifold > > > > Does anyone on this list have a 20B exhaust manifold that came with their > engine that I could buy? > > > > No; but I do know the thing is massively heavy. I looked at one when I got > my engine, and decided quickly it was not very interesting for an aircraft. > Maybe if radically modified . . . Just my opinion. > > > > Al G > > --0015175caaf6d46038046218588f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Robert,
 
I have one that came with my 20B.  I don't want to sound nega= tive, but I don't think it is realistic to use on an a/c.  First, = it is incredibly heavy because it is designed to incorporate the twin turbo= s.  And it is made of cast iron, so it would probably melt at prolonge= d WOT operation.  And the passages are very restrictive = ;to exhaust flow.  I could weigh mine and send some pictures if y= ou wish.  Sorry, but I don't want to get rid of it because I have = plans for a 3-rotor auto installation where it would be useable.  Mayb= e you could modify a Renesis manifold to fit.  It would require some w= elding, but it is probably more likely to work than the original 20B manifo= ld. 
 
The cheapest manifold would be to use 304SS handrail material.  I= built my first manifold using that material and after 100 hours it looks l= ike it would last for a very long time.  Ed Anderson has been using th= is material on his a/c for a long time.  My exhause flange materi= al was 1/2" mild carbon steel and it was holding up fine as it doen= 9;st see the high heat that the pipes do.  The problem was with the mu= fflers.  They take a real beating.  Try to space the muffler as f= ar away from the engine as possible. 
 
Mark S.
 


 
On Wed, Feb 4, 2009 at 7:43 AM, Rob <rob@mum.edu> wrote:<= br>
Al and Greg,
Thanks for your replys on this subject= . I realize the manifold would be too heavy but I was hoping I could widdle= it down some how. Greg, I would be interested in your suggestion for doing= that. I'm putting this 20B in a BD-4.
Robert
 
Robert Bollinger
MR722 MUM
Fairfield IA 52557
(641)472-7000 e= x2068
(641)919-3213 cell
rob@mum.edu
----- Original Message -----
From: Greg Ward
Sent: Tuesday, February 03, 2009 11:= 10 PM
Subject: [FlyRotary] Re: 20B manifol= d

Al, you don't want the stock exhaust.&nbs= p; Get one built.  If you want to know one way it's done, let me k= now.
Greg Ward
Lancair 20B in progress
----- Original Message -----
From: Al Gietzen
Sent: Tuesday, February 03, 2009 8:2= 5 PM
Subject: [FlyRotary] Re: 20B manifol= d

<= span style=3D"FONT-SIZE: 12pt"> 

Does anyone on this list have a 20= B exhaust manifold that came with their engine that I could buy?

<= span style=3D"FONT-SIZE: 12pt"> 

No; but I do know the thing is = massively heavy.  I looked at one when I got my engine, and decided qu= ickly it was not very interesting for an aircraft.  Maybe if radically= modified . . . Just my opinion.

 

Al G


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