X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-wy0-f180.google.com ([74.125.82.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4520097 for flyrotary@lancaironline.net; Tue, 19 Oct 2010 21:48:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.180; envelope-from=rwstracy@gmail.com Received: by wyb35 with SMTP id 35so829155wyb.25 for ; Tue, 19 Oct 2010 18:47:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=FBBLQVEzTJRGlhp+qcA2RqMyzBAq090gaoZM5pEhlss=; b=AtYZVPkJjJyL8uEamWh1Yrm1zgf/KTog7zAUPDdS67MKyeZ/nhoCQEzWjFGv0yyeEz t++Oi8kvW45f/9pIWFLG5QF5TeJvMD1fZQrPEvdi9//IJNqe73MuzB6pf0K1dmw2/VZK Hhzm/ErcSXjoLI3FrbAMasgb6HclpbiKsdrNw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=s/7dGdqu0KDI/+57gGn0rKMyLsnnV3DLeNtGTdX6wSdE3gHTLfd59X2jmoJi8eWTB3 5srZaCAiP7XZzxxt1pAwYtB8qhn8ohVrbDJZf3D/dV23iP7kikoZU3WVWG9LdeUEtH1Z 2k0T3IQYX3YU16dOKuQDjemXlZRSLQGPhysZ4= MIME-Version: 1.0 Received: by 10.216.82.197 with SMTP id o47mr6915841wee.45.1287539255992; Tue, 19 Oct 2010 18:47:35 -0700 (PDT) Sender: rwstracy@gmail.com Received: by 10.216.72.18 with HTTP; Tue, 19 Oct 2010 18:47:35 -0700 (PDT) In-Reply-To: References: Date: Tue, 19 Oct 2010 21:47:35 -0400 X-Google-Sender-Auth: yXO22ffl44hS6DBC_fy1uTbPeTI Message-ID: Subject: Re: [FlyRotary] Re: header parts source From: Tracy To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001636eefd2afce09504930297c5 --001636eefd2afce09504930297c5 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable IF you use thick enough material, even mild steel will work. I used 321 fo= r 2 reasons. You can go thinner with it than 304 and reduce the weight. I put 900+ hours on a set of headers made from .035 321 SS with no signs of deterioration (other than the metal turning a dark color). 321 SS is the nicest welding alloy I've ever worked with. I tried welding Inconel with n= o luck at all so I would have needed professional help if I used that. Tracy On Tue, Oct 19, 2010 at 8:22 PM, Jeff Luckey wrote: > > I thought that people were commonly using 321 for Rotary exhaust systems > because it has a higher temp rating. > > It's been a while, but I vaguely remember looking it up, and the max > working > temps were something like this: > > 304 =3D 1200F > 321 =3D 1600F > > So, my question is, are people using 304 successfully for Rotary exhaust > systems. If so, that's great, because it's cheaper & more readily > available. > > > > -----Original Message----- > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On > Behalf Of Ernest Christley > Sent: Tuesday, October 19, 2010 07:51 > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: header parts source > > Jeff Luckey wrote: > > Does Columbia now carry 321 stainless. IIRC, I pinged them about a yea= r > > ago and they did not carry 321 stainless=85 > > > > > > I also bought bends from Columbia. Their service and delivery was > excellent. > > I don't see any mention of 321, but I wasn't really concerned about it. > Given the diameter of tube we have to use for > exhaust flow, and the thickness we need to contain the exhaust pulse, and > the corrosion resistance characteristics of > the alloys at elevated temperatures, I couldn't see enough of a differenc= e > to stress over. > > > > > -----------------------------------------------------------------------= - > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] > > *On Behalf Of *kevin lane > > *Sent:* Monday, October 18, 2010 22:03 > > *To:* Rotary motors in aircraft > > *Subject:* [FlyRotary] header parts source > > > > > > > > I have been happy with Columbia mandrel bending. they make their own > > parts, family run, and significantly cheaper than burns. > > http://www.mandrel-bends.com/catalog/ > > > > last week I finally got the v-band, another 90=B0, a flex joint, and > > muffler added to this header. > > > > > > > > > > > > KevinLane Carpentry > > www.KevinLaneCarpentry.com > > > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --001636eefd2afce09504930297c5 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable IF you use thick enough material, even mild steel will work.=A0 I used 321 = for 2 reasons.=A0 You can go thinner with it than 304 and reduce the weight= .=A0 I put 900+ hours on a set of headers made from .035 321 SS with no sig= ns of deterioration (other than the metal turning a dark color).=A0=A0 321 = SS is the nicest welding alloy I've ever worked with.=A0 I tried weldin= g Inconel with no luck at all so I would have needed professional help if I= used that.

Tracy

On Tue, Oct 19, 2010 at 8:22 PM= , Jeff Luckey <= JLuckey@pacbell.net> wrote:

I thought that people were commonly using 321 for Rotary exhaust systems because it has a higher temp rating.

It's been a while, but I vaguely remember looking it up, and the max wo= rking
temps were something like this:

304 =3D 1200F
321 =3D 1600F

So, my question is, are people using 304 successfully for Rotary exhaust systems. =A0If so, that's great, because it's cheaper & more re= adily
available.



-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ernest Christley
Sent: Tuesday, October 19, 2010 07:51
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: header parts source

Jeff Luckey wrote:
> Does Columbia now carry 321 stainless. =A0IIRC, I pinged them about a = year
> ago and they did not carry 321 stainless=85
>
>

I also bought bends from Columbia. =A0Their service and delivery was
excellent.

I don't see any mention of 321, but I wasn't really concerned about= it.
Given the diameter of tube we have to use for
exhaust flow, and the thickness we need to contain the exhaust pulse, and the corrosion resistance characteristics of
the alloys at elevated temperatures, I couldn't see enough of a differe= nce
to stress over.

>
> ----------------------------------------------------------------------= --
>
> *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
> *On Behalf Of *kevin lane
> *Sent:* Monday, October 18, 2010 22:03
> *To:* Rotary motors in aircraft
> *Subject:* [FlyRotary] header parts source
>
>
>
> I have been happy with Columbia mandrel bending. =A0they make their ow= n
> parts, family run, and significantly cheaper than burns.
> ht= tp://www.mandrel-bends.com/catalog/
>
> last week I finally got the v-band, another 90=B0, a flex joint, and > muffler added to this header.
>
>
>
>
>
> KevinLane Carpentry
> www.Ke= vinLaneCarpentry.com <http://www.KevinLaneCarpentry.com>
>



--
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--
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