LUMEN Evolution for Lunar Lander Propulsion

Kurzfassung

The DLR project LUMEN (liquid upper stage demonstrator engine) aims at developing, building and operating a modular LOx/LNG breadboard engine in the thrust range of 10 kN to 30 kN with a total lifetime of more than 7200 s over multiple ignitions. Since these characteristics meet the main requirements for recently proposed lunar lander missions and the configuration allows easy interchangeability of components, LUMEN is not only qualified for the propulsion system of the lunar lander but also for deep space missions. In addition, the tools developed at DLR Lampoldshausen enable the operational range of the demonstrator engine to be extended in order to meet the remaining requirements, making it a competitive engine base for possible future lunar missions. This paper presents the current and possible improvements of LUMEN and assesses its suitability as a lunar lander engine for multiple landings and take-offs as part of cargo transport missions.