Forum Posts

Peter Murgatroyd
Jul 20, 2021
In Technical
I am considering replacing our original spoon rudder blade, which is now needs some attention, and this has led to two queries. Our current blade measures 10mm thick. The original plans specified 3/8 inch, which equates to approximately 9.5mm. The class rules require 12mm. Has the minimum blade thickness been increased since the original plans were drawn up, or has there been an error in converting the original dimensions to metric units? I have been unable to find any discussion of the relative benefits spoon vs parallel blades in my archive, even though this extends back as far the 1974 handbook. The introduction of the parallel blade must pre-date that. May I ask for advice on the choice, please? Thank you.
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Peter Murgatroyd
Jul 14, 2021
In Technical
Hello, We have a new suit of Banks sails and have been checking the measurements against the values in the Association rules. Everything is fine for both main and genoa, except for the measurements of quater, half and three-quater widths on the mainsail. The rules do not define the way these measurements should be made, and no measuremments we make come consistantly close to the reference values in the rules. Please could someone provide a clear description of how to make these measurements in a way which reflects the way the values in the rules were defined? Thank you. Best wishes to all readers! Peter & Ruth
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