YAMADA POWER!!
an four-stroke engine. yes indeed, with an extreem, high and beautiful power. Always the power when you ask for it. Really super engines. How do they do it? Simple, just an supercharger on it and there he goes. The YS160DZ(Dingo) is used for 3D-planes more then 16 pounds!! on that kind of plane you would need an 60cc (or more) gasoilengine, but they are 2 pounds heavyer and are not as fast with the power then an YS-engine. Try it, to belief it!