I think Diff shaped for Barland in '69 or '70. Here’s a board he made for the current french champion back then. It was made in a friend’s garden and Diff found a peacock’s feather that he laminated under the glass. I eventually became the owner of that board and even rode it in the 1970 french championship and took 5th place (there must have been 6 guys competing…)
I still own the board and will keep it forever. Here it is:
Google “ferro cement” it’s been used to build super tough boat hulls. If you built it in two halves and figured out how to get the halves to stay together without cracking, you could maybe get it together at about 100 lbs.No, make that about 150lbs, almost forgot about the weight of the rebar.
Google “ferro cement” it’s been used to build super tough boat hulls. If you built it in two halves and figured out how to get the halves to stay together without cracking, you could maybe get it together at about 100 lbs.No, make that about 150lbs, almost forgot about the weight of the rebar.
Concrete is strong under compression, weak under tension. Prestress the concrete in compression (rather than using rebar in the normal manner) to increase the strength.