Machines | Tractive effort ruling grade
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The term tractive force is the pulling or pushing force exerted by a vehicle on another vehicle or object. The term tractive effort is synonymous with tractive force, and is often used in railway engineering to describe the pulling or pushing capability of a locomotive. In the 1953 edition of Railway Engineering Hay says "The ruling grade may be defined as the maximum gradient over which a tonnage train can be hauled with one locomotive....The ruling grade does not necessarily have the maximum gradient on the division. Momentum grades, pusher grades, or those that must regularly be doubled by tonnage trains may be heavier." This means the "ruling grade" may change if the management chooses to operate the railroad differently. Fun with Model Railroading via help from Wikipedia
Comments
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Maybe a denser material for the loco then?
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Thanks for the video, a lot of great information here!! Ron B.
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Do you have a video on how to do the car cards
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I see what your saying so when u have 2 engines both weigh the same but ones a 6 and ones a 4 axle the 4 will pull more cause of the wheel drag ? yeah i understand that f units have more space for more weight but you know we all like the sd units so then we get stuck buying more then one or 2 or 3 ..I see you run about 3 unit per train ..I just need to learn how to make a consist with my NCE dcc I know its easy but when i do it nothing happens so i am missing something .the book dont help
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that makes it a bit easier, i model in N scale too.
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continued from my last note : and they cant make the engines pull for then 10 cars each ..wow its not understandable ..to me we pay for the detail in the shell and not how good it works not fair we should pay for how good it works not for how good it looks I dont care how many bolts are in the detail I want the engine to pull my freight cars ...tell me what you all think ...
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one other thing I DONT get is why does a gp 35 pull more cars then a sd 90 mac and why can i pull more cars with a u25b then with the bigger engines 6 axles ..I dont have any grades on my main lines now casue of that fact I just want to be able to pull long trains with out having more then 2 engines so i run more 40' and 2 bay open hoppers ...and when you pull the MTL cars then its even less cause they are heavier and harder to pull ...all the work they put into the engines
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eric how does the cars work on super elevated track ( canted ) i have all new kato ..plue what is your grade on the area you used to determine how many cars the engines will pull
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You model in Ho scale,right?
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Hi Eric, I use the rule of 3 wagons per powered axle on a 3% grade to make up my trains. I'm also a N Scale model railroader here in Australia & model American. I find that the 3 wagons for 3% makes a decent size train & it won't stall on a grade. I know that some locos have better adhesion than others but I try & stick to a general rule as to not to overload my locomotives tractive effort ability.
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yea i know. i was just saying that the video was very interesting
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Another teriffic video Eric. Thanks for sharing this info with us. I personally like the way you apply real world railroading principles in a simplified manner. I, like you, prefer to spend time running my trains. Sitting in a room with my trains crunching numbers on a calculator trying to figure out how long my trains should be is counterintuative to me. Your system makes complete sense to me. Thanks again.
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Wight of engine determine how many cars it will pull .
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Most model rr's train length is determined by the shortest siding if you operate .
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A brother excellent video with lots of information. Will come in handy. Who makes those Car Cards you use?
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nevertheless, your strategy helps and I like it. I wonder if it works for HO though. Bigger and heavier engines than N scale.
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eric...your response to my post on slippage about a 2 months ago was, 1- 50' car for each axel +1.5. i have been using your formular & have no problem running 29 cars with 3- 6 axel units on a 2% grade. since my sidings can accomodate 15 cars, the only time i would run 29 cars is if i do a through freight from phoenix to ash fork vinny
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very interesting system you have working here! It might even work for HO scale, which I model. I was wondering if the same rule applies for steam engines (the # of axels on a steam engine will determine its pull power?)
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That was very informative and much appreciated.
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You about do what I do, with a 2% grade like mine you need helper.I run a mix bag of loco's. Bob ;{)