I won't argue with any of your comments. But I am still fascinated by this little display engine. The pictures are not enough to really work from. I plan to get better pictures the next time we go to Disneyland. Disney's Customer Relations has stonewalled me. First, telling me they have no indormation. And second by say I cannot get off the wait line path to take picture and measurement. (Maybe this would be a case of asking forgiveness is easier than getting permission!)
The idea that it looks like it was made in a mining machine shop, not a production shop makes it of interest to me. The issue of the parallel link is dealt with by pivoting the cylinder at the base, which is kind of like all the little "wobbler" steam engine plans around. The black box with the brass cap with the pressure gauge on it looks to be connected to the front axle; wondering it that could be the valve for the cylinder. Is it possible/practical to have the valving that far from the actual cylinder? But then how would the steam lines get connected to the cylinder that is swaying back and forth as the beam moves. I know we used really thick walled hoses for steam in the milk processing plant we had when I was a kid; could short sections of flexible hose be used to connect the rigid steam pipe to the swaying cylinder?
Lots of questions with no answers. I'll update when/if I ever get some better pictures or information.