ORIGINAL: MinnFlyer
Well I rarely disagree with John, but I'll take the throatty sound of a 4-stroke over the annoying, high-pitched sound of a 2-stroke anyday. Single OR twin!
The OV-10 Bronco had turboprops....I built the 52 inch Uravitch from plans and powered it with two OS 25FX engines running macs minipipes. To me that was a better sound match for the turboprops than any four stroke.