Hey all,
I am in need of a system to lift a ~300ton object off the sea floor. I have had suggestions of using a rack and pinion system driven by an electronic/hydraulic rotary drive unit, or using a multiple stage hydraulic ram with locking pins.
What are the pros and cons of the two options...
I came across this and have found myself curious about how it works.
http://www.openhydro.com/images.html
They build devices up to 16m diameter. As it is air-cored the bearings must be at the rim but I would have assumed it near impossible to manufacture something to the required tolerances for...
