ESA Document - Emits - ESA
ESA Document - Emits - ESA ESA Document - Emits - ESA
s Supporting structure Value characteristic Overall mass (tonnes) 3.6 Diameter (m) 5 Length (m) 9 HMM Assessment Study Report: CDF-20(A) February 2004 page 66 of 422 Figure 2-33: MOI supporting structure characteristics Once used, the stacks of the first stage are jettisoned. Once the stacks of the second stage are used, they and the supporting structure are jettisoned. The used stacks of the first stage will be provided with a small propulsion system that will allow the required manoeuvres to avoid the collision with Mars (raise the pericentre). 2.7.7.1.2.3 TEI It provides the required ∆V for the trans Earth injection manoeuvre. It is composed of one single stage, composed of a 80-tonne stack and a supporting structure. Storable propulsion technology has been selected for this module. The design of the stack is identical to the one of the first stage of the MOI. Stack characteristics Value Overall mass (tonnes) 80 Propellant mass (tonnes) 76.3 Engine RD-0212 Thrust (kN) 612 Diameter (m) 5 Length (m) about 9.5 Figure 2-34: TEI stack characteristics The stack will be placed inside the supporting structure of the MOI, attached to a conical adapter to the THM.
s 2.7.7.1.3 Mars excursion module Supporting characteristics structure Value Overall mass (tonnes) 5.2 Initial diameter (m) about 2 Final diameter (m) about 2 Length (m) 5 Figure 2-35: TMI supporting structure characteristics HMM Assessment Study Report: CDF-20(A) February 2004 page 67 of 422 This mission element is the one that allows a crew of three astronauts to land on the surface of Mars and take off after 30 days to rendezvous and dock with the TV. It is composed of three main elements: • Descent Module, mainly composed of the deorbit propulsion system, inflatable heat shield, back cover and parachutes for the entry and descent. • Surface Habitation Module, a cylindrical module that will house the astronauts during their stage on the surface providing life-support systems and EVA equipment to perform the exploration. The landing systems (retrorockets and landing legs) are located in this module. It will also provide the interfaces with the MAV. • Mars Ascent Vehicle, the ascent vehicle in which the astronauts will return to orbit, mainly composed of a capsule (in which the astronauts will be placed also during the descent) and a propulsion module split into two stages. It will provide life support for 5 days. The MEV will be attached to one of the extremities of the TV, in a docking port on the longitudinal axis of the TV.
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s<br />
Supporting structure Value<br />
characteristic<br />
Overall mass (tonnes) 3.6<br />
Diameter (m) 5<br />
Length (m) 9<br />
HMM<br />
Assessment Study<br />
Report: CDF-20(A)<br />
February 2004<br />
page 66 of 422<br />
Figure 2-33: MOI supporting structure characteristics<br />
Once used, the stacks of the first stage are jettisoned. Once the stacks of the second stage are<br />
used, they and the supporting structure are jettisoned. The used stacks of the first stage will be<br />
provided with a small propulsion system that will allow the required manoeuvres to avoid the<br />
collision with Mars (raise the pericentre).<br />
2.7.7.1.2.3 TEI<br />
It provides the required ∆V for the trans Earth injection manoeuvre. It is composed of one single<br />
stage, composed of a 80-tonne stack and a supporting structure. Storable propulsion technology<br />
has been selected for this module. The design of the stack is identical to the one of the first stage<br />
of the MOI.<br />
Stack characteristics Value<br />
Overall mass (tonnes) 80<br />
Propellant mass (tonnes) 76.3<br />
Engine RD-0212<br />
Thrust (kN) 612<br />
Diameter (m) 5<br />
Length (m) about 9.5<br />
Figure 2-34: TEI stack characteristics<br />
The stack will be placed inside the supporting structure of the MOI, attached to a conical adapter<br />
to the THM.
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