06-02-2013, 06:58 PM
Keep it simple. I don't use anything more than a 2% grade in HO; that' about 1" in 4 ft. I add about a foot of transition at each end. That works for all of my 4 & 6 axle diesels. So if I want to go up 12" I go 48 ft + 2 ft for transition = 50 ft. If I only want to go 4", that works out to 16 ft + 2 ft for transition = 18 ft. Like I said, keep it simple. If you're coming off curves such as helix's than add some more transition...there's no magical formula; just common sense.
willie
willie
willie