Train speed

[Sumpter250]

speed, is really a constant, so if 44 feet/second=30MPH, then 44 scale feet/second = 30 scale MPH...or, 1 steam era boxcar/second = 30 MPH.....close enough for government work. Oh, and I do not allow anyone with a radar gun, anywhere near my layout!

Do you know how the "constant factor" was arrived at..??

The "constant" converts feet/second, into miles/hour...or Scale feet per second, into Scale miles per hour. 88 feet/second is 60 MPH.
{{ 60 X 5280=316800 feet per hour.../60 (minutes)=5280 feet per minute (hmmm mile a minute)/60(seconds)=88 feet per second}}

88 X .6818 =59.9984 (.0016 MPH (8.448 fps) short of 60mph)

*****the "constant" is actually .681818181818181818181818181818181818****

You can use a constant because speed is linear 44FPS=30MPH, 88FPS=60MPH, 176 FPS=120MPH. What ever you do to FPS, also happens to MPH.

Two steam era boxcars = 80 feet.....Two steam era boxcars / second =80 SFPS =60 SMPH..close enough for government work.