The exhaust system developed by Powersport has the ability to remove the heat and pulsation of the rotary engine without deforming or splitting apart and without back-pressure buildup. This exhaust system consists of stainless steel tubing, slip joints, inconel bellows, internal muffler, and machine profiled engine flanges. The complete exhaust system now is totally configured inside the cowling. Add the heat removing shrouding and our tail pipe noise suppression tip and this combines to deliver an exhaust system that is strong, heat flexible and relatively quiet. The 81 decibel readings are less than a comparable Lycoming Engine with a higher pitch resulting in the quiet turbine sound. The shroud around the exhaust manifold and exhaust pipe vents heat into the muffler bay and out into the slip stream, protecting adjacent parts and areas from heat damage.

The objective of this muffler system is heat dissipation with suppressed noise and no power loss due to back pressure. The results show this is being achieved. Jim and Jerry demonstrated these in their RV-8's flying showcase at Oshkosh 2005. We received lots of comments, all very positive, saying the Powersport rotary airplanes now sound like a quiet turbine. Due to numerous requests from the other rotary engine builders and fliers, Powersport will be offering this exhaust system as a kit they can configure into their installation.