11D423

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Engine Model: 11D423. Government Designation: 11D423. Designer: Izotov. Developed in: 1963-67. Application: LK-700S manned lunar spacecraft project ascent stage. Propellants: N2O4/UDMH. Thrust(vac): 134.000 kN (30,124 lbf). Isp: 326 sec. Country: Russia. Status: Development ended 1968.

Krasniy Oktyabr Joint Stock Company, St. Petersburg, built for ascent stage of Chelomei LK-700S manned lunar project. Engines for UR-100 stage 2 and LK-700 probably identical; maybe had same designation. Gas generator cycle; 2 large turbine exhaust pipes. Other LK-700 drawings give engine designation as 15D13 with slightly different thrust.

11D423 used on Rocket Stages

Used on stage: UR-700-4. on launch vehicle: UR-700.

Bibliography:

Russian Space Industry, Federation of American Scentists Web Pages, 1998 via Dietrich Haeseler. Web Address when accessed: http://www.fas.org/spp/civil/russia/.
Siddiqi, Asif A, Soviet Space Web Page, 1999 via Dietrich Haeseler. Web Address when accessed: http://home.earthlink.net/~cliched/main_space.html.
Federation of American Scientists Web Site, Web Address when accessed: http://www.fas.org/.

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