ORIGINAL: Lou Crane
Jens,
I tried to respond, but timed out (?)
Go with Jim Thomerson's ideas.
I don't know cyrillic characters, but the large wording on the box looks like it would sound like something meaning Model Monoplane. I can't read the small print. If you read Russian, or know someone who can, more information might be right there.
\BEST\LOU
I am speaking and reading russian since i am married with ukrainan wife.
Кордовая модель самолет mean Line controlled model air plane, the small text are informaion where the airplane was produced in Гомельский Завод Спортивного самолета (Gomelskiy sportairplane factory).
There are not technical information, nothing text about engine size..
The airplane are smaller than other airplane with 2.5 cc engine and the width of the cutout for the engine are 21 mm/0,826 inc.
Jens Eirik