rynd2it Posted April 26, 2023 Share Posted April 26, 2023 I read somewhere on here that someone had come up with a simple formula for adding weight to rolling stock. It was somwething like grams per cm of length between buffer stocks but I can't find it even using the search engine. Anyone recall this and can point me in the right direction? Thanks Link to post Share on other sites More sharing options...
RMweb Premium melmerby Posted April 26, 2023 RMweb Premium Share Posted April 26, 2023 I would've thought just enough to keep it on the track. Link to post Share on other sites More sharing options...
rynd2it Posted April 26, 2023 Author Share Posted April 26, 2023 4 minutes ago, melmerby said: I would've thought just enough to keep it on the track. And how much is that? The formula worked well, I just can't find it, nor do I have access to the rolling stock I fitted. Link to post Share on other sites More sharing options...
NIK Posted April 26, 2023 Share Posted April 26, 2023 Hi, The NMRA have info on weighting rolling stock. Their figures may be more suitable for very long freight trains and you might get away with a bit less. If the train is too heavy the loco may struggle for speed and grip. Regards Nik Link to post Share on other sites More sharing options...
rynd2it Posted April 26, 2023 Author Share Posted April 26, 2023 10 minutes ago, NIK said: Hi, The NMRA have info on weighting rolling stock. Their figures may be more suitable for very long freight trains and you might get away with a bit less. If the train is too heavy the loco may struggle for speed and grip. Regards Nik The NMRA numbers are based on USA practice with bogie wagons and very long trains; I'm running 009 with about 4 - 5 short wheelbase wagons. Like I said, there is a simple formula out there but I can't find it. Link to post Share on other sites More sharing options...
rynd2it Posted April 26, 2023 Author Share Posted April 26, 2023 ALL RIGHT! a friend reminded me of where I got it from: To save you watching it all it is 5gm per cm between the buffer stocks. But the video is worth a look, if a tad OTT ;) Link to post Share on other sites More sharing options...
RMweb Premium Bernard Lamb Posted April 26, 2023 RMweb Premium Share Posted April 26, 2023 41 minutes ago, rynd2it said: I read somewhere on here that someone had come up with a simple formula for adding weight to rolling stock. It was somwething like grams per cm of length between buffer stocks but I can't find it even using the search engine. Anyone recall this and can point me in the right direction? Thanks Ian Rice. 20-25 grams per axle. Although he does point out the difficulty in actually acheiving that in some types of wagon. Note number of axles rather than length is the key factor. Bernard 1 Link to post Share on other sites More sharing options...
RMweb Premium NFWEM57 Posted April 26, 2023 RMweb Premium Share Posted April 26, 2023 (edited) 10 minutes ago, Bernard Lamb said: Note number of axles rather than length is the key factor. I use weight per axle or per bogie for wagons and coaches. For locos I try to get most of the weight on the drivers for steam and the driven bogies for diesels to maximise traction for metal on metal; I avoid traction tyres. Agree, Iain Rice 20-25 grams per axle. The mainline coaches for my test track com in at 75g per bogie, 150g overall. Later Hornby Class 43 HSTs come in at 260g per bogie, 520g overall. Edited April 26, 2023 by NFWEM57 Link to post Share on other sites More sharing options...
RMweb Gold Buhar Posted April 26, 2023 RMweb Gold Share Posted April 26, 2023 If you have some heavier wagons, eg kitbuilt in whitemetal, try to have them at the head of the train, placed at the rear they may pull lighter stock off the rails on curves. Alan Link to post Share on other sites More sharing options...
NIK Posted April 26, 2023 Share Posted April 26, 2023 28 minutes ago, rynd2it said: The NMRA numbers are based on USA practice with bogie wagons and very long trains; I'm running 009 with about 4 - 5 short wheelbase wagons. Like I said, there is a simple formula out there but I can't find it. Hi, You asked for a simple formula and I sent a link to a simple formula. You didn't mention 009 and 4 to 5 wagons. Regards Nik Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now