The RD-264 concist of four RD-263's used for the R-36M. KB Yuzhnoye only ordered the first stage propulsion to Energomash.
The RD-0255 is a propulsion module composed of an RD-0256 main engine and a RD-0257 vernier engine
LAUNCH ATTEMPT | 74 |
ISC Kosmotras LAUNCH ATTEMPT | 2 |
PAD LAUNCH ATTEMPT | 2 |
LAUNCH ATTEMPT | 5434 |
ISC Kosmotras LAUNCH ATTEMPT | 19 |
PAD LAUNCH ATTEMPT | 5 |