– The formwork for experiment_2 was out of a mdf frames. Fabric was suspended from the frame and clamped together with 2 different sizes of circles.
The smaller size circles was made from bottlelids and the larger ones was a standard size polystyrene ball cut in half. It required quite a bit of precision to make sure that the two circle-clamps where matching up on both sides.
– The flexible surface was a very stretchy textile membrane (rubber coated Lycra).