WARNING, This is a development branch and it may not be stable. Use at your own risk

Starship Expansion Project

Starship Expansion Project (SEP) is a mod being developed by me, Kari, and our amazing team. Our project aims to bring our intepretation of the Starship vehicle by SpaceX into Kerbal Space Program. While a lot of the design choices are based on the actual vehicle sitting on Boca Chica, creative freedom is used to expand our mod even further.

Dependencies:

• B9 Part Switch
• Waterfall
• ModuleManager
• KSPCommunityPartModules
• KSPCommunityFixes
• Harmony 2

Recommended Mods:

• Community Resource Pack (Mod is balanced around Methalox)
• Shabby 0.4.0 or later + Resurfaced (Mod is itended with PBR materials)
• Kerbal Joint Reinforcement Continued
• Starship Launch Expansion
• FlyByWire SAS Mode
• MechJeb 2
• Editor Extensions Redux
• Flight Manager for Reusable Stages (FMRS)
• Trajectories
• HullCameraVDS & NeptuneCamera
• Hangar Extender

Roadmap

You can check my roadmap on https://trello.com/b/UPblvcar/karis-roadmap

Discord

I also have a discord server, enter for updates, dev talk or to have fun https://discord.gg/CQzk9H84pr

Known Issues

• Grid Fins can cause big roll oscillations if actuating with the engines, make sure to disable them on ignition
• If you're experiencing wobbly grid fins, reduce the authority limiter (inconsistent)
• Stock staging readings reads only part of cluster thrust data. Use KER or MJ instead

LICENSE

All configs are distributed under CC-NC-SA-4.0 license. All assets (all .dds, .png and .mu files) alongside with our StarshipExpansionProject.dll are distributed under an All Rights Reserved license.

You may not redistribute or re-use these assets without express permission from the author. Updated on December 14th, 2025