This pack provides the eponymous engine from Project Orion, as well as the parts to build Project Orion vessel designs.
Delete the previous version of Orion (if any) and place the GameData/Orion, Gamedata/CommunityResourcePack, If Module Manager is not already intalled, place the ModuleManager.dll into GameData.
This work is licensed under a MIT license.
ModuleManager - made by Sarbian & Ialdabaoth - http://forum.kerbalspaceprogram.com/threads/55219-Module-Manager-1-5-6-%28Jan-6%29