Board Thread:Galaxy on Fire Questions and Answers/@comment-24141350-20131107144024/@comment-6002884-20131107220653

As far as I know, you have to use the Cronus after intercepting the convoy that took you to Kothar. The Cronus has a built-in Khador Drive, and you get a brand-new, equippable drive after completing the Valkyrie storyline to replace the one you lost prior to that.

 ~XenoDarth~ 22:06, November 7, 2013 (UTC)

Edit: I just added this tidbit of information in the walkthrough article. Just finish the rest of the Valkyrie storyline; you don't have to worry about the loss of your Khador Drive.