I got a Arne Hende .6cc Mini Dyno in the mail from "down under" today. (.036 cubic inch.) Here it is next to my A.H 2cc Dyno (full size). The .6cc starts so easily that I hold the prop close to the spinner with my thumb and index finger and make like I'm snapping my fingers! It swings a 7" prop quite well. According to a magazine article from 1986, it will turn 7x4 at up to 7500 RPM. (Model Building, June 1986; Stu Richmond) <Arne Hende made yet another Dyno at only .25cc, the Baby Dyno.>