@coach joe posted:
Mel, the Amtrak looks good on the big layout, the speed is not too fast although I see the lap times mimic your time between mileposts, in the 30 second range.
Thanks. The track distance around the O-72 outer loop is 32.14 feet, 1542.8 feet full-scale, 0.292 miles full-scale. The lap time in the video is 22 seconds, so the scale speed is about 70.1 feet-per-second, 47.8 miles-per-hour. I've never run anything faster than 80 scale-miles-per-hour on the layout. 120 scale-miles-per-hour might not stay on the tracks.