Probably the single most discussed topic in aircraft building circles.  2-stroke or 4-stroke?  Auto conversion or purpose designed aero engine?  Air cooled, water cooled, reduction drive, direct drive – the possibilities seem endless.  And we haven’t even got on to weight, HP, torque, fuel consumption, reliability, TBO…

Check out the sub-pages to see what we’ve dredged up in our travels…

4-stroke engines

2-stroke engines