The Wave-Cancelling Effects of Waveless Bulb on the High Speed Passenger Coaster M/S “KURENAI MARU”

This is the second one of the three connected papers. This part concerns the full-scale experiment on the high speed passenger coaster M/S “KURENAI MARU”, where a comparison is made between two different hull forms with and without the attached large bulb, which was specially designed according to the Waveless Form Theory.Descriptions are made on the results of the turning test and the so-called serpentine test (zigzag test) as well as on the ordinary speed trials.Besides a small amount of unexpected bottom fouling effeets upon the hull resistance, coincidence is satisfactorily good between the tank predictions (refer to the First Report) and the trial results.Concerning the manoevering characteristics, the attached large bulb F 4 has demonstrated itself as effective in decreasing somewhat the values of K' and T', where K', T' are the dimensionless indices of manoeverability, recently. introduced by Prof. Nomoto.