Christophe, my experience with it till now.
http://www.rcuniverse.com/forum/m_60..._4/key_/tm.htm

My conclusions so far. It is a weak engine for its displacement, not for its weight. I will place it soon on a pattern ship to see if it will do any better in the air and improve after running in.

I'm about 500 rpm away from the numbers that OS claims at bottom of page:
(my fuel 15% aerosave 10% nitro)
http://www.os-engines.co.jp/line_up/fs-200s/index.html