比如新泽西的这张公试航速表，按照这个分别计算海军部系数，结果是
56900^(2/3)*15.5^3/16800 = 327.91452714759
56900^(2/3)*20.05^3/38000 = 313.78658920465
56900^(2/3)*24.9^3/78000 = 292.80486131952
56900^(2/3)*27.92^3/126400 = 254.7264318651
56900^(2/3)*29.30^3/163400 = 227.73283526538
所以说用同一艘船的吨位马力航速往回算，这个应该是常数的数值差别却这么大。还是说是我理解有误么？