Edit post

Edit your reply below.

Post Body
Enter your post below.
Do understand correctly, you want to run head end, mid train, and rear units? The last two as helpers or as DPU? I don't have personal experience using DPUs/helpers. But what I've heard they work best and safest if they are really needed to get the train up the hill. In model railroading the only difference between manned helpers and DPUs seems to be that helpers are cut in and out somewhere on the road. On the prototype it is an economical question. If the hill is long and steep enough compared to the run the go with DPU, is it comparatively short they might run helpers. And don't forget dynamic braking downhill. In times of DPU there are not many helper districts left. CSX's Sand Patch, NS out of Altoona, and MRL's Mullan Pass. As far as I know BNSF and UP us manned helpers on a very limited basis on Cajon Pass and a few other locations. Usually DPUs do the job. Regards, Volker Edit: BNSF has power limitations for its trains. Trains are only allowed to have a defined number of "rated powered axles" (RTA): <a href="http://www.smartlocal933.org/BNSF%20SSI%20No.4.pdf">www.smartlocal933.org/BNSF%20SSI%20No.4.pdf</a> Look at page 70. The RTA for different locomotives can be found on page 7
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag

Update Reply

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Model Railroader Newsletter See all

Sign up for our FREE e-newsletter and get model railroad news in your inbox!