I finally designed the crossheads after figuring out what features I'd like to incorporate. In addition, I updated the 3-d model to include the valve gear components. This included designing a bracket for the valve gear to mount to, as I couldn't use the original 0-4-0 design (the #2 driver interferes with the brackets).
A profile view of the 2-8-0 as it stands now. You can see that I've also added the aesthetic details such as spokes and so forth. This helps the appearance of the CAD drawing, and is easier on the eyes while trying to differentiate the different parts and such.
3-d view.
That said, I hope to start machining the crossheads pretty soon. I'll be making them out of SAE 932 bronze (round stock) on the lathe, then moving to the mill to complete the process. After that, I will have to either modify the original rear cylinder heads or make new ones so that I can have the crosshead guides properly spaced. Then I can figure out where I can mount the various components and then go from there. The CAD drawing should be pretty close, but we all know that CAD drawings don't always exactly match the finished product. But I'm satisfied with what I've got to date!
