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Odyssey CEV

The CEV is modeled after a concept shown on Lockheed -Martins site some time ago.

Later on Lockheed-Martin changed their design. I think the vessel name 'Odyssey' is best suited to identfy the original concept.
 
Main design features, as shown on the picture from left to right:

• Lunar Module (LM)
  Provides habitable space for a crew of 4 for 14 days (1 lunar day).
  Consists of a descend module (containing an airlock, a small workroom and storage space) and an ascend module (which is the habitat).
  Total mass 37 ton (incl. 20 ton of fuel)
  Delta V descend stage 2400 m/s, ascend stage 1900 m/s.
  
  
• Command Module (CM)
  A capsule with a heat shield and parachute for a direct reentry from a lunar return trajectory. Transports a crew of 4 to the moon or to the ISS. Can accomodate as many as 7 for short trips, to evacuate a fully manned ISS if required.
  Total mass 5 ton (only 75 kg RCS fuel for reentry steering).
  
  
• Ressource Module (RM)
  Provides maneuvering capability, electrical power supply via solar panels, communication and life support.
  Total mass 13 ton (including 10 ton fuel).
  Delta V is 2900 m/s for a CM+RM stack.
  
  Note: Unlike Apollo the RM is not designed to maneuver the whole LM+CM+RM stack into lunar orbit. This will require a separate LOI stage, or an upgraded LM, or an LM flying separately to the moon, waiting there for the CM+RM to arrive and dock.
  

The CEV can be launched on an Atlas 5 Heavy launcher (included with the addon) or use the Delta IV Heavy Versatile (which is a separate addon). For missions to the moon an upgraded Delta IV Heavy with an Earth Departure Stage (EDS) ca be used.

Tip: Landing the LM on the moon can be quite tricky. The use of the LandMFD is  recommended.

building blocks

From left to right:

• Earth departure stage
•  Ressource module
• Command module
• Landing Module

Note: Depending on the mission design the use of 2 earth departure stages may be necessary.

	LES - Launch Escape System This solid rocket system provides an escape possibility during the first minutes of the launch, while the boosters and first stage are burning. Once ignited it would carry the command module away from the launcher to a safe distance.
	CM - Command Module Provides habitable space of 4 m³ per astronaut for a crew of 4, can be manned with up to 7 astronauts for short trips. Contains short time life support systems, navigation electronics and reentry systems like the heat shield and the parachutes.
	RM - Ressource Module Provides life support, electrical power, communications and steering capability.All vital systems - including the engines - are doubled and can be crossed over for redundancy. Electrical power is provided through solar panels.
	LM or LSAM - Lunar Surface Access Module It consists of a descend and an ascend stage. The ascend stage is the habitat providing living space for a crew of 4 for one lunar day (= 14 earth days). With a diameter of 4 m it is considerably more spacious than the old Apollo LM. The descend stage is connected to the hab via a tunnel. Airlock and storage space for EVA equipment is in the descend stage.
	EDS - Earth Departure Stage Basically an upgraded Delta 4 upper stage with an additional orbital maneuvering system. It can provide maeuvering support with the CEV attached, so the CEV-EDS stack can dock to targets like the LSAM.
	Delta 4 Heavy Launcher An upgraded Delta 4H launcher with the capability to lift as much as 50 ton into low earth orbit.