In TOS, the Enterprise demonstrated ridiculous speeds with warp drive, so, why not the Valiant? Why must everyone assume that once warp technology was discovered, you must go at only warp one and warp one is only the speed of light? It's like inventing the car, and say it can only go 1 mph even though the first car could go much faster than 1 mph. The discovery opened up warp science, not just warp one. Don't let later retconning change what was done in TOS. Simply let the Valiant go 800c at low warp speeds, and then it reaches the edge of the galaxy in about a year which I consider a long time. The Enterprise gets there and back in days and I bet she never broke a sweat, but she probably started closer to edge than the Valiant: Captain's log, Star date 1312.9. Ship's condition, heading back on impulse power only. Main engines burned out. The ship's space warp ability gone. Earth bases which were only days away are now years in the distance. No where in WNMHGB does it say that the Enterprise was the first ship to get "that far" out there. Kirk was only surprised that another Earth ship 200 years ago was out there. Captain's log, Star date 1312.4. The impossible has happened. From directly ahead, we're picking up a recorded distress signal, the call letters of a vessel which has been missing for over two centuries. Did another Earth ship once probe out of the galaxy as we intend to do?Who do you suppose built the huge Lithium Cracking Station on Delta Vega that was only a few light days from the edge of the galaxy?