Pub Date : 1900-01-01DOI: 10.3940/rina.ijsct.2007.b2.6007
L. Tier, M. Owen, T. Sadler
In the last decade canting keels have moved from the exotic to the mainstream in offshore racing yacht design. Now classes from Minis to Maxis are designed with canting keels, but several recent high profile failures in the Vendee Globe and Sydney Hobart have brought designers back to the drawing board to have a closer look at the design and construction methods involved for both the keel fin and the actuation system. Although rules are now beginning to appear for stability criteria and safety in the event of actuation failure, there are not as yet any general structural guidelines beyond the ABS Guide for Offshore Racing Yachts. Aimed at more conventional yachts they can never hope to take into account the complicated loadings on canting keels. Estimates of hydrodynamic loads, slamming loads, grounding loads and loads from the ever increasing danger of hitting unidentified floating objects must be made. Then tools such as FEA are invaluable in the analysis of a structures response. Choices of material and construction are based on the type of yacht and racing it will be required to do as well as restrictions in some class rules such as the Volvo Open 70. Optimisation of sailing characteristics, weight, safety and operation are all taken into account. Once built and fitted, the work is not over as keels are routinely checked for structural integrity before and after major events even before their estimated fatigue mileage is complete. Owen Clarke Design has been associated with canting keel design for many years, during which time there has inevitably been an evolution in techniques and many learning experiences. The aim of this work is to pull together our experience in design, construction and analysis into a reference that others may benefit from and add to, in order to improve safety and reliability of canting keel design.
{"title":"Practical Aspects of Canting Keel Design, Construction and Analysis","authors":"L. Tier, M. Owen, T. Sadler","doi":"10.3940/rina.ijsct.2007.b2.6007","DOIUrl":"https://doi.org/10.3940/rina.ijsct.2007.b2.6007","url":null,"abstract":"In the last decade canting keels have moved from the exotic to the mainstream in offshore racing yacht design. Now classes from Minis to Maxis are designed with canting keels, but several recent high profile failures in the Vendee Globe and Sydney Hobart have brought designers back to the drawing board to have a closer look at the design and construction methods involved for both the keel fin and the actuation system. Although rules are now beginning to appear for stability criteria and safety in the event of actuation failure, there are not as yet any general structural guidelines beyond the ABS Guide for Offshore Racing Yachts. Aimed at more conventional yachts they can never hope to take into account the complicated loadings on canting keels. Estimates of hydrodynamic loads, slamming loads, grounding loads and loads from the ever increasing danger of hitting unidentified floating objects must be made. Then tools such as FEA are invaluable in the analysis of a structures response. Choices of material and construction are based on the type of yacht and racing it will be required to do as well as restrictions in some class rules such as the Volvo Open 70. Optimisation of sailing characteristics, weight, safety and operation are all taken into account. Once built and fitted, the work is not over as keels are routinely checked for structural integrity before and after major events even before their estimated fatigue mileage is complete. Owen Clarke Design has been associated with canting keel design for many years, during which time there has inevitably been an evolution in techniques and many learning experiences. The aim of this work is to pull together our experience in design, construction and analysis into a reference that others may benefit from and add to, in order to improve safety and reliability of canting keel design.","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126267950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2007.B1.6707
F. Caprio, C. Pensa
{"title":"Experimental Investigation on Two Displacement Catamarans: Systematic Variation of Displacement, Clearance and Stagger","authors":"F. Caprio, C. Pensa","doi":"10.3940/RINA.IJSCT.2007.B1.6707","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2007.B1.6707","url":null,"abstract":"","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127663642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2006.B1.40
Ana Paula de Paula Loures de Oliveira, N. Fonseca, C. Soares
{"title":"Design and Sea Performance of a Modern Purse Seiner Fishing Vessel for the Portuguese Coastal Sea","authors":"Ana Paula de Paula Loures de Oliveira, N. Fonseca, C. Soares","doi":"10.3940/RINA.IJSCT.2006.B1.40","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2006.B1.40","url":null,"abstract":"","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126265823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2003.B1.0306
T. Dobbins, S. Samways
{"title":"The Use of Tactile Navigation Cues In High-Speed Craft Operations","authors":"T. Dobbins, S. Samways","doi":"10.3940/RINA.IJSCT.2003.B1.0306","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2003.B1.0306","url":null,"abstract":"","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124719856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2005.B1.36
R. Curry
{"title":"An Assessment of ISO 12215 Small Craft Hull Construction With Classification Society Rules","authors":"R. Curry","doi":"10.3940/RINA.IJSCT.2005.B1.36","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2005.B1.36","url":null,"abstract":"","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133996045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2005.B1.27
R. Steen
{"title":"Fast Rescue Boats","authors":"R. Steen","doi":"10.3940/RINA.IJSCT.2005.B1.27","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2005.B1.27","url":null,"abstract":"","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130173490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2014.B2.150
A. Bishop, Ckh Chin, G. Thomas
This paper investigated the fuel consumption of fishing vessels operating within the southern rock-lobster fishery and the south-eastern shark and scalefish fishery in Tasmanian waters. This was undertaken by sending a questionnaire to operators surveying different vessels and estimating the vessels’ efficiency. The estimated yearly efficiency was checked using a one sided t-test and a 95% confidence interval. Using this efficiency the fuel consumption for the 2011 calendar year for southern rock-lobster and SESSF long-line vessels was estimated to be between 1.12 to 1.6 ML and between 0.70 to 0.80 ML respectively. To reduce this fuel consumption, different engineering solutions such as removal of bilge keels, service speed reduction and addition of bulbous bow were investigated, and it was found that vessels could reduce their fuel consumption by 5 to 20%.
{"title":"Energy use of fishing vessels operating in Tasmania","authors":"A. Bishop, Ckh Chin, G. Thomas","doi":"10.3940/RINA.IJSCT.2014.B2.150","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2014.B2.150","url":null,"abstract":"This paper investigated the fuel consumption of fishing vessels operating within the southern rock-lobster fishery and \u0000the south-eastern shark and scalefish fishery in Tasmanian waters. This was undertaken by sending a questionnaire to \u0000operators surveying different vessels and estimating the vessels’ efficiency. The estimated yearly efficiency was checked \u0000using a one sided t-test and a 95% confidence interval. Using this efficiency the fuel consumption for the 2011 calendar \u0000year for southern rock-lobster and SESSF long-line vessels was estimated to be between 1.12 to 1.6 ML and between \u00000.70 to 0.80 ML respectively. To reduce this fuel consumption, different engineering solutions such as removal of bilge \u0000keels, service speed reduction and addition of bulbous bow were investigated, and it was found that vessels could reduce \u0000their fuel consumption by 5 to 20%.","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115521259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2004.B1.15041
A. Rosén, K. Garme
The aim of the experiment was time-domain monitoring and analysis of the pressure distribution on planing craft inwaves. A model was instrumented with pressure transducers and towed in calm water, ...
{"title":"Model Experiment Addressing the Impact Pressure Distribution on Planing Craft in Waves","authors":"A. Rosén, K. Garme","doi":"10.3940/RINA.IJSCT.2004.B1.15041","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2004.B1.15041","url":null,"abstract":"The aim of the experiment was time-domain monitoring and analysis of the pressure distribution on planing craft inwaves. A model was instrumented with pressure transducers and towed in calm water, ...","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123243609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3940/RINA.IJSCT.2004.B2.24041
T. Kinoshita, H. Kobayashi
{"title":"Improving Rower Motion and Rowing Equipment By Using Rowing Velocity Prediction Program With Estimated Hydrodynamic Load Acting On An Oar Blade","authors":"T. Kinoshita, H. Kobayashi","doi":"10.3940/RINA.IJSCT.2004.B2.24041","DOIUrl":"https://doi.org/10.3940/RINA.IJSCT.2004.B2.24041","url":null,"abstract":"","PeriodicalId":355970,"journal":{"name":"The International Journal of Small Craft Technology","volume":"81 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120980171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：