Manning Oars and Halyards as a Summer Outing
نویسندگان
چکیده
منابع مشابه
A Note on Manning Reductions and Navigation
controlled ? Pilotage is obviously impractical and should be unnecessary. The masters concerned know the area all too well, but they do not know so much about routing or radio control. Nor are they always particularly amenable to instruction or advice when they get it, for the control system would have to be extended to such crafts as fishing boats, whose present habits in congested waters leav...
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Propulsive Efficiency of Rowing Oars
Is the common folklore, that oars are less efficient at propulsion than propellers, correct? Here we examine the propulsive efficiency of the oars used in competitive rowing. We take the propulsive efficiency η of rowing to be the ratio of the energetic benefit, the energy Db dissipated by boat drag, to the energetic cost, the work Wr performed by the rower. Air drag is neglected as is the ener...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1905
ISSN: 0036-8733
DOI: 10.1038/scientificamerican05061905-360a