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Old 05-10-2016, 07:11   #16

Join Date: Jun 2015
Posts: 2,494
Re: How Short Can A Short Mast Actually Be?

Quote: "Arab dhows......very short masts with huge sprits..."

Quite right, but let us remember that the dhow evolved to take advantage of the Southwest Monsoon blowing them east to the shores of India beginning in May/June, and the Northeast Monsoon blowing them back to Araby and the coast of Africa beginning in October. Downs did better on a beam reach than did the European square riggers, but they were (and are), nevertheless, "downwind ships".

Obviously many yotties spend a lot of time before the wind, but weatherliness is a safety feature that should NOT be made light of - particularly by yotties. If you find yourself embayed and your "iron wind" is in a cranky mood, only weatherliness will save your bacon! And weatherliness cannot be achieved nearly as well by a short mast as by a tall one.

Now, if you wish to achieve weatherliness courtesy of 3.2K RPM - no skin off my back. After all, TrentePieds is a motorsailer with a miserly SA/D despite the fact that her mast is longer than her LOD. To drive her SA/D into a region "acceptable" in modern practice, while retaining the sloop rig and keeping it all "inboard" of her length, I would need a forty five foot mast on a thirty foot LOD! Doing so in isolation of other considerations, would clearly have unpleasant consequences for stability.

I am merely advocating that the OP should WHY he makes the choices he makes, and what the unintended consequences of those choices may be, and that the OP should find that knowledge through a systematic investigation of the literature rather than by a brief question on an internet forum Marchaj would indeed be a good place to start :-)


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