If the design of the shape of the air bladders in the sides of a folding boat mimic {HEAD ~ the shape} of {TAIL ~ the air mattress} discussed above, and if their placement and orientation in the folding watercraft is such that the natural bending resistance about its y axis works against the natural bending or flex of a folding boat hull as illustrated in the canoe in the rapids, then a method is arrived at to control hull flex 
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If the design of the shape of the air bladders in the sides of a folding boat mimic { HEAD ~ the shape } of { TAIL ~ the air mattress } discussed above , and if their placement and orientation in the folding watercraft is such that the natural bending resistance about its y axis works against the natural bending or flex of a folding boat hull as illustrated in the canoe in the rapids , then a method is arrived at to control hull flex
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