Kermes

The Hermes from The Martian is a very big ship, this is a Kerbal stock parts only build of it, some in-space assembly required.

 The Kermes 2 is assembled from seven modules, each includes a lifter to get it to assembly orbit (~150Km):

• Command & Lab Module
• Comms & Sensor Array
• Ring
• Hub & Docking
• Aft Panels
• Propellent Tanks
• Propulsion

The propulsion segment has 18 Ion engines which are sufficient to move the craft in Kerbal orbit, have not attempted a Duna transfer yet but there should be sufficient Xenon Gas on board to make the trip.

For Historical purposes here is the original Kermes which had some issues:

Included are several craft files, each with a launcher setup for assembly at about 150Km above Kerbin.

Lift and assembly in roughly this order: 

– Command & Lab Module

– Forward Panels

– Docking Ports

– Hub

– Propulsion

– Spoke x 4

– Ring Braces

Some assembly required 😉

Related mods:

Adam’s Stock Mir Space Station Green Sun Mun Base [Stock] [STOCK] Zephyr STS II-NASA Replica Orb8Ter – Mining the Mun Part 2 Craft Files Realistic Nasa Space Shuttle scale 1 Kerbal Mobile Refinery The K-MP ~The Kerbin-Mün Project Space Station Y