flyrotary@lancaironline.net Mailing List Archive

Hi Steve, I would be interested in what your costs are when you get it finished. I have a tangential muffler with cool tube, similar to several that have broke, so I may be looking for an alternative. I already don't like the high heat levels under the cowl. :( Your layout appears to be quite close to what I would need, possibly with the down tube moved a little forward. If I used something like that, I think I would start with a run of straight pipe a few feet down the fuselage and see how bad the noise was. I like Buly's suggestion also. Seems like it would be a little extra insurance against cracking and it would make engine removal a little easier. Do you have the Mistral gear reduction also? They seem to have done a great job on the design. Bob W. (DAR sometime this month, I think!) On Thu, 7 Sep 2006 22:02:49 -0400 Bulent Aliev <atlasyts@bellsouth.net> wrote: > Steve, one thing I would do is have short stubs welded to the flange > and than the bends slipped on top with slip joints. > The rest of it looks good. Have tabs on each side of the slip joints > for springs to pull the two parts together at all times, but allow > for some movement if the pipes expand or twist. > Bulent "Buly" Aliev > FXE Ft lauderdale, FL > http://tinyurl.com/s5xw8 > > On Sep 7, 2006, at 8:28 PM, Steve Thomas wrote: > > > I have been lurking on this list for some time, really enjoying and > > learning from all of your experiences. I'm the guy who has > > Mistral's serial number 001, two rotor normally aspirated engine. > > > > I just finished tacking this exhaust system together and thought > > that I'd ask for comments. The current material is mild steel, but > > my plan is to take it to Burns Stainless (just down the road from > > me) and have them duplicate it in 16 ga. 321 stainless. The > > collector is from Burns, as is the muffler. If you can see the > > tacks, you'll be able to see why I'm taking it elsewhere. ;-) The > > header pipes are 2" and the combined pipe after the collector is 2 > > 1/2". This was recommended by Burns. > > > > After fabrication, I plan to have it coated with HPC HyperCoat > > Extreme as my design goal was to get the heat out as quickly and > > directly as possible and keep as much in the pipes as possible > > until it exits to atmosphere. > > > > The oddball bends in the header were designed to keep the header > > pipes the same length, which they are. Given all the difficulty > > some have had with their exhaust systems, I'd thought that I'd > > throw it out there for comments. > > > > Best Regards, > > > > Steve Thomas > > SteveT.Net > > > > ______________________________________________________________________ > > __ > > <DSCN0168.jpg> > > > > DSCN0168.JPG > > > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (first engine start 1/7/06) Custom Cables for your rotary installation - http://www.roblinphoto.com/shop/