 Machinery problems were likely to delay the ships well past their intended delivery dates of 1943 – 44 . Three turbines were delivered by Brown <unk> in 1939 to <unk> for the Sovetskaya Rossiya , but the <unk> <unk> Works never completed a single turbine before the German invasion in June 1941 . A prototype boiler was supposed to have been built ashore for evaluation , but it was not completed until early 1941 , which further complicated the production plan . 
