Peripheral ported rotary engines have typically been very noisy. Is that the case with the Rotapower engine?
The engine exhaust is loud, and needs a reasonably sized muffler. We have used a combination of two mufflers with good success. First the 530cc four stroke needs a tuning length of 20″ of 1 1/2″ stainless steel pipe then the primary muffler. As an extra measure you can add a secondary muffler (like a SuperTrapp) at the end.
