True Caliber of Almaz Nudel'man Cannon?

[David Lee Rickman]

What was the size of the cannon installed and tested on the OPS-2 / Salyut 3? Conflicting reports have it as either 23 mm NR 23 Schit-1, or the upgraded 30 mm NR 30 Vulcan. Does anyone here have the definitive answer and can cite their source?

[VK]

The question must be addressed to the NK editorial staff. I think they have a possibility to ask the Nudelman company.

[David Lee Rickman]

The question must be addressed to the NK editorial staff. I think they have a possibility to ask the Nudelman company.

While I greatly appreciate this suggestion, I have already attempted to contact representatives of Tochmash and am waiting to see if I get a reply. If I do not hear back from them then perhaps I may be able to persuade editors of NK to make the same attempt :wink: .

[AnNSK]

По-моему там была пушка Р-23 Рихтера.