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Brute-force approach

This is the procedure for getting the platform from the hole in the ground in which it was cast, into the water. It is described for the ¼ scale experiment, because it will not be practical with the 300 ton full scale module. This may still be problematical, the item weighs 3.3 tons. It will require 3-4 people.

Hazards: If the cable snaps, heads, or other body parts, could roll. Have care not to get pinned beneath the platform, ie stay to the sides, keep away from front and rear.

Alternative airbag scheme

This is a speculative way to launch the 50 foot module, that will be easy, if it works. It must be tried out on the ¼ scale module first. If it fails, we fall back to the brute-force method above. The idea is to construct a large air bag from the 6 mil poly, like we do for the water bags. We place it under the poly layer that lines the bottom of the mold. When ready, we inflate the bag to raise the platform up a few inches. It's counter-intuitive, but the pressure in the bag is .53 psi under the ¼ scale, and only 1.07 psi under the full scale module. This corresponds to tension forces of 1.06 and 2.14 lbs , respectively across a linear inch, no threat to 6 mil poly. The hazard is punchuring the bag with something sharp left in the pit, or whatever.

Now wait a minute! Thats not the way I figured tension in a wirerope ring around the perimeter wall. Need to review the physics. Anyway:

If this gets out of control, the momentum will be awesom. If this doesn't work on the ¼ scale model, we will have to look at the track mechanism (the 'ways') used to launch large vessels in a shipyard.