Just in case, an article (in Russian) questioning the nozzle construction of Apollo lunar modules (a part of series including e.g. photos of "lost" BP-1227 being returned to the US).  It's unclear which "computer program" is used for calculations therein but at least the initial numbers (both factual and estimated) as well as calculated ones might come interesting for someone who was partial to the US Moon affairs  if such folks still hit such pages, of course. )