Original archive entry. The text, images and links below are kept as they were written.
Subtopics
R-40A Marquardt N2O4/MMH rocket engine. In Production. Thruster developed for Shuttle Orbiter orbit control. The orbiter had 38 long scarf, short scarf, or no scarf configurations, depending on the location.
R-40B Redmond N2O4/MMH rocket engine. In Production.
