This is the instructions i have made for the Union Pacific Big Boy steam engine Inspired by Jayhurst.
I have changed the design to work with Power Functions instead.
This means that the tender had to be redesigned.
Update 2016-07-27: I have made changes to the train boogies as well to make it run corners much more smooth than
with the original desing.
I have also made changes to the sides of the boiler to make it look more like the original train.
The instructions and partlists have been updated to the new design.
Union Pacific Big Boy
The instructions can be downloaded
The part list can be downloaded
All instructions are created with MLCAD and the LDraw Library of Parts.
As it takes a lot of time for me to make these instructions, please make a donation to my paypal account
to insure the further development of instructions on this site.