Section 4.3.9.
Home Tour Join! Contents Team News Catalog Search Comm

Engine for Trans-Lunar Shuttle

I based the reference mission hardware on using the RL-10 engine for trans-lunar propulsion even though it was a bit more powerful than we really need to do the job. Here are some specs for the folks working on spaceship designs:

     RL-10 Engine:         RL-10-A-3-3A

     rl_10_eng_wt          305       lb
     rl_10_mixture           5       5:1 O:H wt
     rl_10_thrust       16,500       lb/engine
     rl_10_isp             444.4     sec
     rl_10_ch_press        475       psi
     rl_10_max_firings      25       max
     rl_10_eng_time          1.25    hours
     rl_10_eng_diam         39.54    inches
     rl_10_eng_len          70.1     inches

     Reference: NASA Publication NP-133 "Accessing Space," NASA 1990		

Based on the DC-X experience, the RL-10 is a bit more robust than even its specifications indicate; but we'd expect the specifications to be a bit conservative.

About the Ascent Stage: Besides the decision to use hypergolic fuel for that one stage, you can see why I didn't want to use an RL-10 to lift a 1500-lb vehicle off the moon. The RL-10 comes in a throttleable version, but 10 g's is a tad bit more acceleration margin than we need.


Home Tour Join! Contents Team News Catalog Search Comm
ASI W9700260r1.1. Copyright © 2007 Artemis Society International, for the contributors. All rights reserved.
This web site contains many trade names and copyrighted articles and images. Refer to the copyright page for terms of use.
Author: Gregory Bennett. Maintained by ASI Web Team <>.
Submit update to this page. Maintained with WebSite Director. Updated Sat, May 9, 1998.