| http://www.w3.org/ns/prov#value | - I would think that part of the tub is pretty stiff even without the rear bulkhead bolted on.The cross section mainly governs - in general terms - rather than the longitudinal length: its shape, closed is much much more stiffer than open, in particular in torsion [the cockpit opening is usually the weak area for this reason]; the area enclosed by the cross section, in torsion; the depth, in bending
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