Glushko N2O4/UDMH rocket engine. Developed 1960-64. Low-expansion ratio gimbaled variant for Proton stage 1 concept. Configuration 4 x 8D43 clustered with 4 x 11D43 abandoned in favor of 6 x Glushko 11D48 in final Proton design.
Status: Developed 1960-64. Date: 1960-64. Thrust: 1,642.00 kN (369,136 lbf). Specific impulse: 316 s. Specific impulse sea level: 285 s. Burn time: 115 s.