The one I have from Dave has 1:20.3, 1:29, 1:32...Greg, I am in contact with Dave. He is not sure he has any parts left but he said he would look. I've seen the bicycle speedometer type and I made up a spread sheet for several different scales that gives you the speed when you time a train over an 18ft (three 6ft sections of flex track) distance. What I would like is a portable unit that does not need to have a special car in the consist. Though I run mostly 1/32 scale I do have some 1/20.3 scale and 7/8 scale so I would like to be able to change the scale speed read out, which I understand Dave's unit can do.
Nick,David, a great track set up, that loco is beautiful. And it can be run at scale speed with a load. Are those voluminous plumes due to the alcohol fuel or the weather at your location on that day?
EDIT: further research shows water vapor is a by product fo burning alcohol, a benefit of that type of loco.