---------------------------------------------------------- Commander-List Digest Archive --- Total Messages Posted Sun 08/21/05: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:40 AM - Re: exhaust noise (rnjthompson@aol.com) 2. 01:52 AM - Re: exhaust noise (rnjthompson@aol.com) 3. 05:46 AM - Re: exhaust noise (Chris Schuermann) 4. 06:23 PM - Re: exhaust noise (Bill Bow) 5. 06:37 PM - Re: exhaust noise (Chris Schuermann) ________________________________ Message 1 _____________________________________ Time: 01:40:51 AM PST US From: rnjthompson@aol.com Subject: Re: Commander-List: exhaust noise --> Commander-List message posted by: rnjthompson@aol.com Chris, Yes it is me who IF I EVER GET OUT OF TAIWAN will endeavour to bring one to the flyin.It basically consists -----Original Message----- From: Chris Schuermann Subject: Commander-List: exhaust noise --> Commander-List message posted by: Chris Schuermann I seem to recall that a Commander owner was going to perform some experiments in an attempt to quite their exhaust noise down. As an owner of an augmentor-tube tube airplane which makes quite a bit of noise (IMO a beautiful sound) I'd be very interested in the results of any experiments. We're beginning to get some complaints at our airport and would like to be proactive in this area. thanks Chris ________________________________ Message 2 _____________________________________ Time: 01:52:03 AM PST US From: rnjthompson@aol.com Subject: Re: Commander-List: exhaust noise --> Commander-List message posted by: rnjthompson@aol.com Hi Chris, I will try this again as I seem to have sent the last one unfinished. The thing is a tube about 4 in long going ito a taper of about 14 in long with a 1/2 in hole at the end. From the point going forward there are 3/8 holes in three triangular patterns going about 6 in.(the final number of holes is still to be determined) This entier cone has three vanes radiating outwards that are welded to the cone and bolted to the augmentor tube. Each vane is about 8 in long and has a tab on the trailing edge (to cause turbulence in the aug.The front at the parrallel tube extends forward of the firewall and covers the stacks.I have made all the patterns etc and only need to cut the tin. I used .030 304 grade stainless sheet. I will bring a prototype to the flyin. I am also going to adapt it to fit a T Bone. Regards Richard -----Original Message----- From: Chris Schuermann Subject: Commander-List: exhaust noise --> Commander-List message posted by: Chris Schuermann I seem to recall that a Commander owner was going to perform some experiments in an attempt to quite their exhaust noise down. As an owner of an augmentor-tube tube airplane which makes quite a bit of noise (IMO a beautiful sound) I'd be very interested in the results of any experiments. We're beginning to get some complaints at our airport and would like to be proactive in this area. thanks Chris ________________________________ Message 3 _____________________________________ Time: 05:46:45 AM PST US From: Chris Schuermann Subject: Re: Commander-List: exhaust noise --> Commander-List message posted by: Chris Schuermann rnjthompson@aol.com wrote: > Hi Chris, > The thing is a tube about 4 in long going ito a taper Hi Richard. I've studied the "Swiss muffler" that seems to be pretty popular in Europe, but I don't think it will work for my needs. They use it on O-200's and smaller and I'm pretty sure my 540's will tear it up quickly. Your description is very interesting, but I can't quite envision the details. How did you come up with that design? Clearly there is a lot of thought put into it. Have you tested it and how is it working so far? Do you have any drawings/pictures/etc you could share? Thanks, Chris ________________________________ Message 4 _____________________________________ Time: 06:23:45 PM PST US From: "Bill Bow" Subject: Re: Commander-List: exhaust noise --> Commander-List message posted by: "Bill Bow" I was having a little problem with the picture in my head too.:>) bilbo ----- Original Message ----- From: "Chris Schuermann" Subject: Re: Commander-List: exhaust noise > --> Commander-List message posted by: Chris Schuermann > > > rnjthompson@aol.com wrote: >> Hi Chris, >> The thing is a tube about 4 in long going ito a taper > > Hi Richard. > I've studied the "Swiss muffler" that seems to be pretty popular in > Europe, but I don't think it will work for my needs. They use it on > O-200's and smaller and I'm pretty sure my 540's will tear it up quickly. > Your description is very interesting, but I can't quite envision the > details. How did you come up with that design? Clearly there is a lot > of thought put into it. Have you tested it and how is it working so > far? Do you have any drawings/pictures/etc you could share? > > Thanks, > Chris > > > > > > > ________________________________ Message 5 _____________________________________ Time: 06:37:03 PM PST US From: Chris Schuermann Subject: Re: Commander-List: exhaust noise --> Commander-List message posted by: Chris Schuermann Bill Bow wrote: > I was having a little problem with the picture in my head too.:>) yeah, but the voices are loud and clear! :-)