Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2993571 for flyrotary@lancaironline.net; Sun, 15 Feb 2004 19:14:22 -0500 Received: from rad ([68.221.170.13]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040216001422.RARJ4980.imf24aec.mail.bellsouth.net@rad> for ; Sun, 15 Feb 2004 19:14:22 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: muffler? Date: Sun, 15 Feb 2004 18:12:20 -0600 Message-ID: <06f001c3f421$8b8652c0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_06F1_01C3F3EF.40EBE2C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_06F1_01C3F3EF.40EBE2C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The guys with straight pipes (even with a lot of 90 degree turns) think they work GREAT! Their hearing went bad shortly after they started = flying them : ) =20 =20 Ha! OK, I'll install the muffler :-)=20 =20 Heck, if I got rid of the muffler, I'd probably end up tail heavy with = all the weight I've removed from the nose. I finished the stainless heat = shield for the bottom of the plane today, and it's all ready to rivet in place. = I decided to order some stainless from McMaster Carr to mount the muffler, = so I'll finish mounting the muffler next weekend. =20 =20 I also tried to expand a 1.75" .035" 321 stainless pipe today. I need = to make it fit the 2-1/8" hole in the exhaust flange, and there's no way = I'm going to be able to do this. It seems like a lot to stretch a thin wall pipe, and I was doing this as a test to see if it would work. Unfortunately, I just can't generate enough force with the tailpipe = expander to do much with it. I used an impact wrench, with about 120 psi of pressure, and the most I could stretch it was maybe 1/16". I assume a custom exhaust shop could do this, but would the 1-3/4" pipe expand successfully to be 2-1/8", or would it split? I'll either have to have = it stretched, or buy something pre-stretched, or perhaps make a new exhaust flange. =20 =20 Ideas are welcome. =20 Cheers, Rusty (I don't think I'm missing any EM-2 connectors Tracy) =20 =20 ------=_NextPart_000_06F1_01C3F3EF.40EBE2C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
The guys with straight pipes (even with a lot of = 90 degree=20 turns)  think they work GREAT!  Their hearing went = bad shortly=20 after they started flying them : )
 
 
Ha!  OK, I'll install the muffler = :-) 
 
Heck,=20 if I got rid of the muffler, I'd probably end up tail heavy with all the = weight=20 I've removed from the nose.  I finished the stainless heat=20 shield for the bottom of the plane today, and it's all ready=20 to rivet in place.  I decided to order some stainless from = McMaster=20 Carr to mount the muffler, so I'll finish mounting the muffler next=20 weekend.  
 
I also=20 tried to expand a 1.75" .035" 321 stainless pipe today.  I need to = make it=20 fit the 2-1/8" hole in the exhaust flange, and there's no way I'm = going to=20 be able to do this.  It seems like a lot to stretch a thin wall=20 pipe, and I was doing this as a test to see if it would=20 work.  Unfortunately, I just can't generate enough force = with the=20 tailpipe expander to do much with it.  I used an impact wrench, = with about=20 120 psi of pressure, and the most I could stretch it was = maybe 1/16". =20  I assume a custom exhaust shop could do this, but would the 1-3/4" = pipe=20 expand successfully to be 2-1/8", or would it split?  I'll either = have to=20 have it stretched, or buy something pre-stretched, or perhaps make a new = exhaust=20 flange. 
 
Ideas=20 are welcome.
 
Cheers,
Rusty=20 (I don't think I'm missing any EM-2 connectors = Tracy)
 
   
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