Beautiful boat! Good visual collection. Especially the first top. You know, in Russia, in the 30's, these projects were not in the official journals. Who wrote about the projects? Grokhovsky. "TM". 1936-41. I look, but not a fact. Grokhovsky was arrested in 1942 and died in the Gulag. Sorry for the comment. I looked at these flying boats and remembered Grochowski.