This model, which is under construction, is not based on any particular prototype, as I want to try out my own crazy ideas, and be free to borrow features from any prototype that catches my fancy.
At last it has limit switches to shut off lift motors at the end of travel. That took a lot longer to get right than I expected!
Drive to wheels is pretty much worked out, but currently all removed for ease of access to gear trains for cord-operated rams.
I think I have to find some stronger cord (but it mustn’t be any thicker!). Unless anyone has any better ideas, I’m thinking of trying braided polyester fishing line.
Next phase will be steering which is based on a weird variation of Gleasman steering, normally used in tracked vehicles.
Everyone wants to know where those wheels come from (aren’t they ugly? But they seemed about the right size). They were brought for £1 each at an auto-jumble stall in the 1990s — I knew they’d come in handy.
There is an article on this model in the June 2020 issue of the Runnymede Meccano Guild Magazine.