Children of Time isn't too heavy on feats, but it's one of the best science fiction books I've read in a good while, so I feel the need to share it and give it more of the attention it deserves. Let's start with a feat that's outright given to us...
Final Results
Maximum interstellar flight speed of Old Empire ships = 75% C
Also as a note, it's not actually the Old Empire; that's just what people who came later called it.
Old Empire ships can travel up to three-quarters of the speed of light, or 75% C.
Final Results
Maximum interstellar flight speed of Old Empire ships = 75% C
Also as a note, it's not actually the Old Empire; that's just what people who came later called it.