Rotaryeng.net has some drawings of a tangential muffler. The basic idea is that the exhaust pulses enter the side of the muffler body and swirl around colliding out of phase with eachother thus reducing the volume and exit out the end. There are no internal parts to burn or melt and the design is simple, compact, and light weight. Has anyone tried this design? How well does it reduce noise? How would power output compare to tuned header pipes and a traditional flow through muffler such as a glass pack? With the high EGTs of a rotary, I can see a glass pack needing to be replaced periodically, but tuned headers and a proven and affordable muffler seem like they would work better while the compact size and the weight savings of the tangential design are very appealing.