May
Model Railroad Trains Video
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Pull-rail freight experts question the model?
I watched videos HO scale model and, in some modelers them head to head double or triple their trains. my questions to my freight train appears realistic, because im going for an independent, but a realistic look, how freights do I need to have a double or triple-head? How locomotive Assists (S) then I add on a train? ex. If I a diesel pull 30 cars, how much aid can I put on?
It depends on several things: 1. Your locomotive heavy enough to get the traction they need to take the train long? To some extent, the locomotive can pull more of the heavier they are. 2. What kind of qualifications do you have? An engine that can pull 40 cars on the road course can be able to handle 10 on a score of 2%. 3. Your cars weighted to NMRA standards? The amount of weight in vehicles can also determine your pulling power. In general, I like to use a rule-powered car by the axle. For Flat course, I say that for each axle I can handle two cars (for example, 2 SD40-2 is equal to 12 axles equals 24 cars). For grades up to 2% I 1.5 cars per driving axle, and a stiff drive axle. So let's say you have 25 cars of a train with three locomotives (SD70M-GP50-SD60, 16 axles) on head. It runs on the flat track until a grade of 1.4%. This is where the aid is usually added, but your rank increases by 2.3% lower on the line. So even if you only have 19 axles for the 1.4% you'd have to plan ahead 2.3%, and instead make sure you have 25 axles (add 1 with head and 2 rear, or three in the middle, or some thing to look better). But what it all really boils down to what personal preference.
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