Glad you like the video! Yes, that is what I meant that the sound of a FF320 is not like a sewing machine.... not at all. It such a fun to play with the throttle!

Chasrb, thanks for the link about Martin Spuetz. I have seen this plane in some RC Magazine here maybe one year ago. Koeln is about 1 hour from here, I do not know Martin. Maybe you have noticed in the beginning of the video (in the background) that my friend Armin has a very nice PT-17 Stearman. It has also a Seidel radial engine, but 5cyl 125cc and I think around 110" wingspan. This plane is about 45lbs flying weight and is terrific scale.

...big boys toys...