Nudelman - Space Rocket History Podcast

Salyut 3 featured a “self-defense” gun purportedly designed by Alexander Nudelman for station use. Some reports suggest it was outfitted with a Nudelman-Rikhter “Vulkan” gun, a modified version of the 23mm Nudelman aircraft cannon, or conceivably a Nudelman NR-30 30mm gun. Subsequent Russian accounts propose the gun was the relatively obscure Rikhter R-23, not widely recognized in Western sources. Allegedly, Pavel Popovich has corroborated these assertions.