1 7 . ▁C 5 . 3 : ▁A ▁T G - 0 2 / AK - 2 7 I ▁burning ▁engine ▁in ▁the ▁gas ▁generator ▁cycle . ▁Development ▁years : ▁ 1 9 5 8 - 1 9 6 3 ▁. ▁For ▁use ▁in ▁the ▁R - 2 1 . ▁S 5 . 3 M : ▁A ▁T G - 0 2 / AK - 2 7 I ▁burning ▁engine ▁in ▁the ▁gas ▁generator ▁cycle . ▁Development ▁years : ▁ 1 9 6 0 . ▁Project ▁for ▁the ▁IC B M ▁R - 9 B . ▁ 4 D - 1 0 : ▁A ▁U DM H / N 2 O 4 ▁burning ▁engine ▁in ▁the ▁st aged ▁comb ust ion ▁cycle . ▁Development ▁years : ▁ 1 9 6 2 - 1 9 6 8 ▁. ▁For ▁use ▁as ▁main ▁engine ▁of ▁the ▁first ▁stage ▁of ▁R - 2 7 . ▁First ▁engine ▁sub mer ged ▁in ▁the ▁prop ell ant ▁tank . ▁ 4 D - 1 0 : ▁A ▁U DM H / N 2 O 4 ▁burning ▁engine ▁in ▁the ▁gas ▁generator ▁cycle . ▁Development ▁years : ▁ 1 9 6 3 - 1 9 6 8 ▁. ▁For ▁use ▁as ▁the ▁ste ering ▁engine ▁of ▁the ▁first ▁stage ▁of ▁the ▁R - 2 7 . ▁Sub mer ged ▁in ▁the ▁prop ell ant ▁tank . ▁ 4 D - 7 6 : ▁A ▁U DM H / N 2 O 4 ▁burning ▁engine ▁in ▁the ▁gas ▁generator