ESA Document - Emits - ESA

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Figure 3-10: Complete propulsion module
HMM
Assessment Study
Report: CDF-20(A)
February 2004
page 136 of 422
Figure 3-11: Backbone Structure
Figure 3-12 shows all the propulsion modules and Figure 3-13 shows the global dimensions.
Within the TMI and the MOI, a staging approach is followed to increase the efficiency of the
system. The TEI has only one stage with one stack and is placed inside the backbone structure of
the MOI.
The TMI has three serial stages; each stage composed of four stacks. The MOI has two parallel
stages, here each stage consists of two stacks.