Jack of Harts

The Peloran, and the Roderan and Shang when they came, did give us at least a few examples of “surplus” hyper and gravitic drives.  The hyperdrives were faster and hardier than our own, and most of the samples were torn apart for study and replication.  We retrofitted a handful of them into existing naval warships though, and those hybrid ships became the fastest warships we owned.  The Russians and Chinese did the same thing of course.