The motor assembly comes next. The motor assembly consists of two plates of 80 mil white styrene. One plate is about 1/8 inch wider than the other. This ledge will fit into a H-6 column that will act as a rail runner on the girder beam assembly. There are two TB-8 tubes on both ends. Theses act simply as bracing. The two TB-12 tubes on the inside will be used to roll the hoist up and down. The back tube as the two TB-8’s are glued to the side plates. The TB-12 with the TB-4 sticking out is a loose fit that can rotate.
The TB-8 tubing have small pieces of TB-4 inserted as shown above. The same applies to the two TB-12 except one end of on tube has an extended length of TB-4.
Holes are drilled into the inside plate and one hole is drilled on one of the outside plates. The tubing is fitted into one inside plate then the other inside plate is attached on the opposite side. Finally the outside plates are fitted and glued in place. Be careful not to get glue around the TB-12 that needs to rotate.
The motor housing is built with 80 mil styrene sides and 40 mil roof laminated with corrugated siding. In the bottom figure you can see the motor housing sitting in the H-6 runners. If the housing is a tight enough fit it can be fitted over the motor assembly without glue. In this case it was a little too wide so spacers had to be added and the housing glued onto the motor assembly. This won’t matter when it comes time to attach the hoist with threading.
