| 摘要 |
PROBLEM TO BE SOLVED: To strongly and easily fix a jet propulsion pump to a proper position. SOLUTION: A rider plate 70 fixed to a hull 14 is provided to be positioned under the jet propulsion pump 30, of which front part 31d is fixed to a rear part of the hull 14 in the travelling direction. The rider plate 70 is fixed to the hull 14 at least in two positions in the travelling direction of the hull, and elastic members 91 and 92 are arranged between the rider plate 70 and the jet propulsion pump 30 to support a rear part of the jet propulsion pump 30 with the rider plate 70 through the elastic members 91 and 92. COPYRIGHT: (C)2005,JPO&NCIPI
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