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Foam-filled mast
Can you hoist a person up a mast at 60 degrees to the vertical, without a capsize? Well, with our imaginary boat w/ a 10m mast, 1.8m keel of 3000 lbs heeled so that the mast is flat on the water: (roughly a 27-footer, pivot boint between mast and keel in the center of the cabin, me on top of the mast.) Mast side: 200 lbs person * 10m = 1000N * 10m = 10,000 Nm Keel side: 3000 lbs Keel * 0.9m = 15,000N * 0.9m = 13,500 Nm Give and take a bit with the approximations, I'd say you can on a 27-footer if you are light and daring and for sure in anything larger than that. But then, in waves that tilt the boat 60 deg from vertical, I wouldn't want to be hoisted to the mast. And I'm afraid that in the waves that generate the ten housand ++ Nm to get the mast under water, the 1100 ft lb (is that approx. 1500 Nm?) mentioned in the next post are rather inconsequential. Not that I've ever tried it. Chris |
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