4 ▁burning ▁engine ▁in ▁the ▁st aged ▁comb ust ion ▁cycle . ▁Development ▁years : ▁ 1 9 8 0 - 1 9 8 6 ▁. ▁For ▁use ▁on ▁the ▁second ▁stage ▁R - 2 9 R M . ▁Sub mer ged ▁in ▁the ▁prop ell ant ▁tank . ▁ 3 D - 3 9 : ▁A ▁U DM H / N 2 O 4 ▁burning ▁engine ▁in ▁the ▁st aged ▁comb ust ion ▁cycle . ▁Development ▁years : ▁ 1 9 8 0 - 1 9 8 6 ▁. ▁For ▁use ▁on ▁the ▁third ▁stage ▁R - 2 9 R M . ▁Sub mer ged ▁in ▁the ▁prop ell ant ▁tank . ▁ ▁See ▁also ▁ ▁Is ay ev ▁— ▁Found er ▁and ▁director ▁of ▁the ▁company ▁until ▁ 1 9 7 5 . ▁N II - 8 8 ▁— ▁The ▁research ▁inst itute ▁where ▁K B ▁Kh im M ash ▁started ▁as ▁OK B - 2 ▁division . ▁K hr unic he v ▁State ▁Research ▁and ▁Production ▁Space ▁Center ▁— ▁The ▁corpor ate ▁parent ▁of ▁K B K h M . ▁United ▁Ro cket ▁and ▁Space ▁Corporation ▁— ▁The ▁government ▁owned ▁corpor ate ▁entity ▁that ▁will ▁en comp ass ▁all ▁a eros pace ▁corpor ations ▁in ▁Russia . ▁ ▁References ▁ ▁External ▁links ▁ ▁K B K h M ▁Official ▁Page ▁ ▁Category : R ocket ▁engine ▁manufact ur ers ▁of ▁Russia ▁Category : A eros pace ▁companies ▁of ▁the ▁Soviet ▁Union ▁Category : K hr unic he v ▁Center ▁Category