Here are two experiments proposed to further test the Bevington Photo:
1. The full size mock-up experiment. It would just include the worm gear and the fork with wheel hub without tire. The goal is to test the angles and size of the hard parts by doing an overlay using a real photo of the mock up to compare with the Bevington photo. The photos would be taken from the same distance so the perspective is the same. The material used in the mock-up will be better if it was lighter. This is because you will need to adjust and support them in different positions. This could take multiple attempts. If the mock-up is heavy like the real thing, then support structures become a bigger issue. I’m thinking a lightweight box frame with fishing line to support the fork below it. The worm gear can have a simple brace mounted to the unseen side. ¾” plywood painted a reflective color can be used for the worm gear. PVC pipe may work for the fork. I don't think it is realistic to do a shadow test with tire and fender full size. This is why the virtual AuoCAD experiment was done.
2. The small scale mock-up experiment. Goal is to test shadows of the tire and fender by using a small amount of clay that can be deformed. It can be worked on inside with artificial light source so becomes realistic. Something like clay or Super Sculpey can be used to work on the fender and tire. Polystyrene pipe shapes and sheet from a hobby or model railroad shop can be used for the hard parts. Once done, a real photo could be taken from a scaled distance and an overlay test done. Not sure how scaled distance affects the perspective?
The tire would not be something that needs to be 3D printed in any of the two experiments since its shape would have to be estimated by trial and error in a material that can be deformed. The Autocad experiment shows the tire had to be deformed.
I’m willing to work on the small scale model experiment and even build it from scratch. I can assist with dimensioned drawings if someone want to take on either building a full size mock up or a small scale mock up.