Earl Wrote:
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> guymonmd Wrote:
> --------------------------------------------------
> -----
> > The train in the video appears to me to be
> doing
> > better that 20 mph.
> > My guess is 25 to 30.
>
> Track speed west of Antonito is 20 mph. 488 is
> running real close to that. The fastest I've ever
> been out there is a little above 25 back when we
> could run 22 out there. I felt REAL fast. BTW 20
> is the fastest one can run without having a
> speedometer on the locomotive (which the engines
> do not have).
By counting revolutions in the video, I get about 18 or 19 MPH. With 44" drivers, the number of revolutions in 7-1/2 seconds is your speed in MPH.
One interesting bit of trivia, the Baldwin Standard Practice books are filled with references to "diameter speed" (348 RPM). Turns out that the speed achieved in MPH at 348 RPM equals the driver diameter in inches. A lot of equations in BSP use diameter speed as the theoretical maximum.