X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet3.per.eftel.com ([203.24.100.44] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4521311 for flyrotary@lancaironline.net; Wed, 20 Oct 2010 17:19:33 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.44; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet3.per.eftel.com (Postfix) with ESMTP id 9B68537E10 for ; Thu, 21 Oct 2010 05:18:53 +0800 (WST) Received: from OwnerPC (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 89081C6066 for ; Thu, 21 Oct 2010 05:16:06 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: header parts source Date: Thu, 21 Oct 2010 07:15:59 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0029_01CB70EF.CFAEB8A0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: avast! (VPS 101020-1, 21/10/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0029_01CB70EF.CFAEB8A0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Brian, That's way too much to have to pay. Worst comes to worst, go to a welding shop and buy some from them. George (down under) Where did you get the inconel rod? Central welding up here in Washinton = wants $35 a pound, minimum order of ten pounds. I've got an inconel = exhaust that is tacked together right now, but can't proceed until I get = some 625 Inconel rod.=20 Brian Trubee Tracy,=20 I used inconel filler rod (which I had to purchase from an aerospace = supply firm in California) and TIG welded my current inconel exhaust. = Welding 625 Inconel was about the same as welding 321 SS, i.e. no = special skills requried. Mark S. =20 On Tue, Oct 19, 2010 at 8:47 PM, Tracy wrote: IF you use thick enough material, even mild steel will work. I used = 321 for 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 no luck at all so I would have needed professional = help if I used that. Tracy=20 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 year > ago and they did not carry 321 stainless=E2=80=A6 > > 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 = difference 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=C2=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 ------=_NextPart_000_0029_01CB70EF.CFAEB8A0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Brian,
That's way too much to have to = pay.
Worst comes to worst, go to a welding shop and = buy some=20 from them.
George (down under)
 
Where did you get the inconel rod? Central welding up here in = Washinton=20 wants $35 a pound, minimum order of ten pounds. I've got an inconel = exhaust=20 that is tacked together right now, but can't proceed until I get some = 625=20 Inconel rod.
 
Brian Trubee



Tracy,
 
I used inconel filler rod (which I had to purchase from an = aerospace=20 supply firm in California) and TIG welded my current inconel = exhaust. =20 Welding 625 Inconel was about the same as welding 321 SS, i.e. no = special=20 skills requried.
 
Mark S. 

On Tue, Oct 19, 2010 at 8:47 PM, Tracy <tracy@rotaryaviation.com>= =20 wrote:
IF you use thick enough material, even mild steel = will=20 work.  I used 321 for 2 reasons.  You can go thinner with it = than=20 304 and reduce the weight.  I put 900+ hours on a set of headers = made=20 from .035 321 SS with no signs of deterioration (other than the metal = turning=20 a dark color).   321 SS is the nicest welding alloy I've = ever worked=20 with.  I tried welding Inconel with no luck at all so I would = have needed=20 professional help if I used that.

Tracy=20


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

I thought that people were commonly using 321 = for=20 Rotary exhaust systems
because it has a higher temp = rating.

It's=20 been a while, but I vaguely remember looking it up, and the max=20 working
temps were something like this:

304 =3D = 1200F
321 =3D=20 1600F

So, my question is, are people using 304 successfully = for=20 Rotary exhaust
systems.  If so, that's great, because it's = cheaper=20 & more readily
available.



-----Original=20 Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20 On
Behalf Of Ernest Christley
Sent: Tuesday, October 19, 2010=20 07:51
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = header=20 parts source

Jeff Luckey wrote:
> Does Columbia now = carry 321=20 stainless.  IIRC, I pinged them about a year
> ago and = they did=20 not carry 321 stainless=E2=80=A6
>
>

I also = bought bends from=20 Columbia.  Their service and delivery = was
excellent.

I don't=20 see any mention of 321, but I wasn't really concerned about = it.
Given the=20 diameter of tube we have to use for
exhaust flow, and the = thickness we=20 need to contain the exhaust pulse, and
the corrosion resistance=20 characteristics of
the alloys at elevated temperatures, I = couldn't see=20 enough of a difference
to stress over.

>
>=20 = ------------------------------------------------------------------------<= BR>>
>=20 *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
>=20 *On Behalf Of *kevin lane
> *Sent:* Monday, October 18, 2010=20 22:03
> *To:* Rotary motors in aircraft
> *Subject:* = [FlyRotary]=20 header parts source
>
>
>
> I have been = happy with=20 Columbia mandrel bending.  they make their own
> parts, = family=20 run, and significantly cheaper than burns.
> http://www.mandrel-bends.com/catalog/
>
>= last=20 week I finally got the v-band, another 90=C2=B0, a flex joint, = and
>=20 muffler added to this=20 header.
>
>
>
>
>
> KevinLane=20 Carpentry
> www.KevinLaneCarpentry.com <http://www.KevinLaneCarpentry.com>
>

=

--
Homepage:=20  http://www.flyrotary.com/
Archive and = UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l


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