When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I was just wondering why rotaries have the lovely pulsating sound they do at idle. if tyhe engine is moving at a constant speed, why would the sound be like that?
I'm no expert, but I'd have to say it's because of how the rotors pass over the ports, vs a 4-stroke piston engine where the piston doesn't actually pass across the valve...