端艇の人力橈漕における漕力の計測と評価

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In the present study we experimented man's pulling force on oarsmanship by a human power and evaluated its quantity for the new face of Cutter-crew of 6 universities in west Japan in October 1996. The experiment of "the basis pulling" means a pair of crewmen sitting on the No.7th and No.8th sheets with powerful rowing named "Tan-riki" was carried out by 2 preparing connection oars with distortion gauges. Meantime, other 5 pairs should be with no rowing. These experiments were carried out six times by every pair in turn. And also "the whole pulling", which means 12 crewmen rowing with "Tan-riki" and "the dash pulling", means 12 crewmen rowing with a hypothesis of the most powerful rowing for a race same as before a pair of the No.7th and No.8th crewmen were recorded for each university. All the experiments were held at Togitsu port in Omura-Bay during still water. We measured the area of output wave-like by analogue data records and calculated man's pulling force(kgf/s) for each univertity. The result was as follows : 1) The output wave-like analogue data record shows the characteristic of the oarsmanship of each university. 2) "The basis pulling" at the 12 crewmen from No.1 to No.12 of each university was calculated. The mean values were from 8.5 to 11.6kgf and their standard deviations were from 1.06 to 1.61kgf. 3) Basing on "the basis pulling", output ratios of the No. 7th and No. 8th crewmen of each university of "the whole pulling", and "the dash pulling" were calculated out. The order of the output ratios had a high correlation to the race result. 4) Race speed of the boat during still water was from 5.0 to 5.7 knots. They were corresponded to the total resistance from 33.0 to 43.6kgf (displacement of boat in 2, 700kgf) by the towing test. Consequently, effective horsepower of each university became from 1.1 to 1.7ps. We also quantitatively estimated the indicated horsepower of a crew, which was about from 0.29 to 0.43ps according to the position of grip, rowlock as well as blade of an oar.
社団法人日本航海学会の論文
1998-09-25

端艇の人力橈漕における漕力の計測と評価

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