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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
>
> ______________________________________________________________________ > __
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