orbital rocket engines References External links The Engines That Came In From The Cold!, Equinox, Channel Four Television Corporation, 2000. Documentary video on Russian rocket engine development of the NK-33 and its predecessors for the N1 rocket. (NK-33 story starts at 24:15–26:00 (program shuttered in 1974); the 1990s resurgence and eventual sale of the remaining engines from storage starts at 27:25; first use on a US rocket launch in May 2000.) NK-33's specifications NK-33 specifications & key components design (in Russian) Rocket engines of the Soviet Union Rocket engines using kerosene propellant Soviet lunar program Science and technology in the Soviet Union Antares (rocket family) Rocket engines using the staged combustion cycle