Skyliner Roller Coaster Lakemont Park Altoona, PA
In an effort to develop a realistic operating model of a coaster I filmed this small wooden coaster at Lakemont Saturday. Watching the video I have found that the speeds down hill vs. the speeds up hill are not significantly different. At the maximum I would guess the speed down is about double the speed up hills and on curves at level or near level. I think a model with fixed voltages to several different portions of the tracks and the use of flywheels on the motors in the cars could produce a realistic model. If you do a search for model roller coasters on you tube you will all of them run entirely too fast. For example: https://youtu.be/XHJx3mqYotg