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Nautical Research Journal 165


16.


which has a similar color but a somewhat diff erent grain structure. T e piece was cut from 4/4 (1-inch thick) stock and processed to size. T e edges were radiused, imitating the original backboard. T e surface was fi nished using a cabinet scraper. T is is the ideal tool for an interlocking grained wood. Two screw holes were marked out and drilled to hold the model to the baseboard. Several coats of gloss rub- on polyurethane were applied.


To hold the model to the baseboard, the fi nish was scraped away between the screw holes and 30-minute epoxy used for a primary bond. Care was taken to orient the model so that the waterline was horizontal. T e longer setting time of the epoxy allowed for making fi ne adjustments to the hull. Once the epoxy had set, holes were drilled into the hull from the rear and brass screws driven. Hanging hardware was then installed on the rear of the baseboard.


T e rudder and mast were attached using aliphatic (yellow) glue aſt er scoring and roughening the areas of baseboard beneath them. (Figure 16) T is completed work on the model.


Appendix A


T e fi rst of four successive Girth Rules for yachts was internationally adopted in 1907. It remained in eff ect until 1920. T e formula used was:


L+B+1/2G+3d+1/3√S—F = R metres 2


where: L = Length of the waterline B = Maximum beam


G = “Chain girth” is measured from the covering board, around the keel and back up


d = Diff erence between “chain girth and “skin girth” at a specifi c measurement point S = Sail area F = Freeboard


Measurements could be made in metric or Imperial units but, either way, the product of the formula did indicate the length of the boat. For instance, a Six Metre yacht might have an actual length of between 10 and 12 metres!


“T e International Rule, also known as the Metre Rule, was created for the measuring and rating of yachts. Prior to the ratifi cation in 1907, countries raced yachts under their own rules and any international competition was always subject to various forms of handicapping. T ese were oſt en subjective and certainly open to protest.” T is quote from Wikipedia shows the importance and signifi cance of the Rule for modern yacht racing. Alfred Benzon of Denmark initiated the idea, and in 1907 the International Yacht Racing Union (IYRU) ratifi ed this fi rst International Rule. (Source: International Six Metre Association History.) Apparently the RCYC was an early adopter of this Rule.


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