X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from lincoln.lisco.com ([69.18.32.37] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3476306 for flyrotary@lancaironline.net; Wed, 04 Feb 2009 12:13:35 -0500 Received-SPF: none receiver=logan.com; client-ip=69.18.32.37; envelope-from=rob@mum.edu Received: from DELL919SZF1 (76-76-233-100.lisco.net [76.76.233.100]) by lincoln.lisco.com (Postfix) with SMTP id B43C52BEF8 for ; Wed, 4 Feb 2009 11:12:53 -0600 (CST) Message-ID: Reply-To: "Rob" From: "Rob" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: 20B manifold Date: Wed, 4 Feb 2009 11:12:53 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0064_01C986B9.86479640" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0064_01C986B9.86479640 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I would be interested to know the weight. I didn't realize that a cast = exhaust manifold made for a 20B could actually melt. It sounds like the = Renesis manifold would be better.. Is the Renesis manifold stainless = steel or what? Robert Bollinger MR722 MUM Fairfield IA 52557 (641)472-7000 ex2068 (641)919-3213 cell rob@mum.edu ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Wednesday, February 04, 2009 8:10 AM Subject: [FlyRotary] Re: 20B manifold Robert,=20 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.=20 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. =20 Mark S. =20 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=20 Robert Bollinger MR722 MUM Fairfield IA 52557 (641)472-7000 ex2068 (641)919-3213 cell rob@mum.edu ----- Original Message -----=20 From: Greg Ward=20 To: Rotary motors in aircraft=20 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 -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 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 ------=_NextPart_000_0064_01C986B9.86479640 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I would be interested to know the = weight. I didn't=20 realize that a cast exhaust manifold made for a 20B could actually melt. = It=20 sounds like the Renesis manifold would be better.. Is the Renesis=20 manifold stainless steel or what?
Robert Bollinger
MR722 MUM
Fairfield IA = 52557
(641)472-7000=20 ex2068
(641)919-3213 cell
rob@mum.edu
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Wednesday, February 04, = 2009 8:10=20 AM
Subject: [FlyRotary] Re: 20B=20 manifold

Robert,
 
I have one that came with my 20B.  I don't want to sound = negative,=20 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. =20 And it is made of cast iron, so it would probably melt at prolonged = WOT=20 operation.  And the passages are very = restrictive to=20 exhaust flow.  I could weigh mine and send some pictures if = you=20 wish.  Sorry, but I don't want to get rid of it because I have = plans for=20 a 3-rotor auto installation where it would be useable.  Maybe you = could=20 modify a Renesis manifold to fit.  It would require some welding, = but it=20 is probably more likely to work than the original 20B = manifold. 
 
The cheapest manifold would be to use 304SS handrail = material.  I=20 built my first manifold using that material and after 100 hours it = looks like=20 it would last for a very long time.  Ed Anderson has been using = this=20 material on his a/c for a long time.  My exhause flange = material was=20 1/2" mild carbon steel and it was holding up fine as it doen'st see = the high=20 heat that the pipes do.  The problem was with the mufflers.  = They=20 take a real beating.  Try to space the muffler as far away from = the=20 engine as possible. 
 
Mark S.
 


 
On Wed, Feb 4, 2009 at 7:43 AM, Rob <rob@mum.edu> wrote:
Al and Greg,
Thanks for your replys on this = subject. I=20 realize the manifold would be too heavy but I was hoping I could = widdle it=20 down some how. Greg, I would be interested in your suggestion for = doing=20 that. I'm putting this 20B in a BD-4.
Robert
 
Robert Bollinger
MR722 MUM
Fairfield IA = 52557
(641)472-7000=20 ex2068
(641)919-3213 cell
rob@mum.edu
----- Original Message ----- =
From: = Greg Ward
To: Rotary = motors in=20 aircraft
Sent: Tuesday, February 03, = 2009=20 11:10 PM
Subject: [FlyRotary] Re: = 20B=20 manifold

Al, you don't want the stock = exhaust.  Get=20 one built.  If you want to know one way it's done, let me=20 know.
Greg Ward
Lancair 20B in = progress
----- Original Message ----- =
From: Al Gietzen
To: Rotary motors in=20 aircraft
Sent: Tuesday, February = 03, 2009=20 8:25 PM
Subject: [FlyRotary] Re: = 20B=20 manifold

 

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

 

No; = but I do=20 know the thing is massively heavy.  I looked at one when I = got my=20 engine, and decided quickly it was not very interesting for an = aircraft.=20  Maybe if radically modified . . . Just my=20 opinion.

 

Al=20 = G


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