Cover of the comic that inspired this project.
A while back I decided to build this giant machine from one of my favorite Uncle Scrooge stories in Lego, at mini-fig scale. Oddly I didn't realize until partway through that the machine is essentially a giant combine with an axe added on the front. Strange how you can sometimes overlook the obvious for half a lifetime.
I had only the above and the following three images for reference, as they're the only usable drawings in the story. I decided to go with the color scheme shown on the cover instead of the interior, and stick with the relatively sparse ornamentation.
Images from Uncle Scrooge Adventures #20 (reproduced without permission).
I set the size of the large front wheels as the reference point, relative to a mini-fig, and worked frontward then backward from there. The large wheels were a challenge, but ended up working well enough. Although the facades are octagonal, the treads are 16-sided and roll fairly well.
I'm not completely happy with the proportions of the result; it looks less squat than in the drawings. But I'm not sufficiently dissatisfied to start over. This took a long time and I want to move on to something new.
Model detail
Here are some construction details on the large and small wheels, which were by far the most complex part of the model:
Wheel detail images.