OREANDA-NEWS. February 12, 2009. Proton-M has 6 modified RD-275 engines. These engines were mounted by the experts from Glushko Energomash R&D, Khrunichev Space Center and other Russian space companies. Current modification of the RD-275 engine is featured by improved power qualities and higher payload capacity.

RD-275 has proven its high reliability by 320 successful launches. About 1950 engines of this type operated with no failure.