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Mark: Thanks...I was wondering if it would make it even quieter with less risk of destroying it
Tom Giddings
VP Avionics Sales MIDWEST AVIONICS 200 Hardy Roberts Dr PO Box 219 West Paducah,KY 42086 877-904 9966 Cell; 727 858-1772 FAX:270 744 3466 tom@midwestaviation.net
On Apr 20, 2011, at 12:46 PM, Mark Steitle wrote: Tom,
If you're running a turbo you shouldn't need a muffler. The turbo serves the purpose of the muffler.
Mark
On Wed, Apr 20, 2011 at 11:37 AM, Thomas Giddings <tom@midwestaviation.net> wrote:
Would a turbo charged application be less of problem with a muffler?
Tom Giddings
VP Avionics Sales
On Apr 20, 2011, at 12:25 PM, Steve Thomas wrote:
Al,
I'd love to have a good tangential solution. Mistral had developed one before they declared bankruptcy. But, their engineer told me that they were loosing at least 5 HP with it. So, if I am ignorant, I am happy to be corrected.
I presume that you have shared your design before? Can I find in in the archives? I am not a welder, so I have to hire any welding that needs to be done, so the cost of an Inconel device will be quite pricy, I presume.
Burns Stainless wrote back to me and wants me to send the failed muffler to them for analyses. Should be interesting.
Best Regards,
Steve Thomas
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On Apr 20, 2011, at 9:51 AM, Al Gietzen wrote:
Steve wrote:
3. At 50% power, my fuel flow is 11 GPH rich and 9GPH lean.
This doesn’t seem right – at 50% power my 20B will run 9-10 gph leaned.
The tangential style mufflers are too power-robbing
My 20B got 265 hp at 6300 rpm on the dyno with the tangential muffler and secondary resonator. With 9.0 : 1 rotors and normally aspirated that’s not all bad.
But perhaps more importantly I now have 213 hour on the inconel tangential and 321 SS secondary; and they are still in good condition. And it is reasonably quiet.
Al G
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