This scheme must run with modest tension on the U-bolts, or they would become kinked at the diagonal wires. It also looks from the slots in the upright wooden elements that you tension the diagonal wires by running down the nuts on the U-bolts - true?It’s a little weird.
Weirder than that.
I haven’t started building anything yet but I’d still like to do a Bleriot XI. I’ve gathered two sets of period drawings and between those and existing examples I ought to be able to kludge one together. Anyways the fuselage is held together by brace wires anchored to U-bolts at every cluster. You can sort of make them out here, top and bottom of that vertical piece:
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However they are adjusted, the working loads in the U-bolts appears to be a small fraction of yield strength. With the bolts at small fraction strength, the nuts are running with small torque - how do you keep them from loosening? Do you run with jam nuts or self-locking nuts (which did not come along until the late 1930's) or are the nuts just constant attention items?