Shipbucket

BB1987 wrote: ↑April 29th, 2019, 12:14 pm That symbol is not actually an M, is the Cyrillic letter for "pe", which is P for us.
https://en.wikipedia.org/wiki/Pe_(Cyrillic)

Thank you, it is changed

Good work, but I'd have another nit-pick (although they aren't Your fault, but rather sloppy terminology on part of Your sources) : R-1 is Soviet name of the missile (copy of V-2) but 'Scunner' is part of US/NATO name (SS-1 Scunner). More significantly, that V-1 clone was NOT named 'Swallow-10X' - it's proper name was Chelomey 10Kh (letter, which in Russian alphabet looks like latin 'X', in English language is written as 'Kh') and 'Swallow' (Lastochka) was (probably) the code-name of it's naval version.

Btw. if You're looking for sources, I'd like to direct Your attention towards such positions as:

Jürgen Rohwer, Mikhail Monakov, Stalin's Ocean-Going Fleet: Soviet Naval Strategy and Shipbuilding Programs, 1935-1953;

A. N. Gusev, Podvodnye lodki s krylatnymi raketami. Postroennye korabli i nerealizovannye proekty;

A. N. Gusev, Podvodnye lodki spetsialnogo naznacheniya. Postroennye korabli i nerealizovannye proekty;

Yu. V. Apalkov, Podvodnye lodki Sovetskogo Flota 1945-1991 gg. (esp. volumes 1 and 2);

Miroslav Morozov, Konstantin Kulagin, Podvodnye kreisera Stalina. Sovetskiye podlodki tipov P i K;

(If You can't get access to any of these, PM me, I'll try to help - also with help with Russian language, which seems to be an issue here.

Russia - Ushakov LPL flying submarine


Russia - Pr.80 Torpedoboat-submarine


Russia - Pr.1231 design 1


Russia - Pr.1231 design 2

Great work!
Never seen the second design for Pr.1231 before, that's a nice find as is the little known Project 80.

...Is 1231 a submersible hydrofoil?

Certainly a unique concept. Even as a child, I never had such an active imagination!

@Erik_T
Well, sort of.
https://en.wikipedia.org/wiki/Project_1231