> > >Ben Baltrusaitis wrote:
     > > >
     > > >Does anyone run their 20B without a muffler?
     > > >I was told by an engine builder that the sound of the 20B is not as intense as the 13B and could be run without a muffler. He said the sound
     was much like
     > > a
     > > >piston V-6.
     > > >Thanks!
     > > >Ben

     > Ben If you don't care for your hearing or your airport you could go unmuffled. (Note that this is a JOKE if there is a language problem)
     > The rotary is one of the LOUDEST engines you will EVER hear if not muffled. That includes the 20 B, the housings being close enough to the 13 B
     that they are
     > interchangeable. The three rotor will just have a more continuous enormously
     > loud exhaust. Don't plan to run any rotary without at least basic muffling.
     > Let me put this in an understandable context. I am an ex-racer and race car
     > builder. I have helped build a RX 2 sedan racer back when you could run
     > most tracks without a muffler. This engine was PAINFUL when wearing foam
     > earplugs INSIDE my regular earmuffs! Standing in the path of the RX2's
     > exhaust hurt worse than standing next to a AA Fuel dragster durring a
     > burnout. The fueler was technically louder (on a DB meter) but the pitch
     > and timber of the rotary exhaust can be very offensive. DON'T RUN
     > WITHOUT A MUFFLER. Your ears will thank you for it.
     > Bill Jepson

     Thanks, Bill, I value your advice and will heed it!
     Ben

 
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