the RD-250M. Used on the Tsyklon-3. A bundle of three RD-250PM form the RD-261 cluster. RD-252 (GRAU Index 8D724): Vacuum optimized version of the RD-250...
January 7, 2016. "ГКНПЦ имени М.В.Хруничева | Жидкостный ракетный двигатель РД - 0146". www.khrunichev.ru. Archived from the original on December 29, 2021...