I finally got both my lift up bridges working. I am following Mike g.'s design. I'm very thankful he shared drawings and photographs with me. I have not done any wiring yet. The linear actuator is powered by my old Lionel DC Type 0100 variable DC power supply I bought to run my HO train back in the late '60s. In the video I am holding the smart phone camera and controlling the supply so I don't crash into the ceiling. I have not turned the track power on since I started this project, so don't worry about crashing trains into the gorge.
I mounted the Atlas Pratt Truss bridge following a video by Eric Siegel from 2008. His was not motorized, but I used the same setup for the hinges and the alignment on the other end. I would have liked the piers for the Atlas Pratt Truss bridge to be not so hefty, but thought I should make them that way to give good support and make a logical base for the hinge mounts.
Next up will be wiring power, limit switches, and track power.
