@Setanta,
DAcron sails were available since the 40's and they sparked the revolution of quick release spinnakers and "Skyscraper sails". Nowadays weve got high UV resistance and big stretch modilii on stuff like ytan ,kevlar, and carbon fibre, BUT, my point was that Gaff rigging in a racing shell is merely harkening back to the tradition of canvas. Since these Wainnos were "One design" classes at the yatch clubs, It didnt matter that they werent that fast without constantly trying to hoist a "Genny".
Ive got nothing against the craft, its kinda nice lined mutha. Its just not going to break any records, for whatever "sq ft class" it would fall in.
Its kinda beamy too, thats a give-in to stability and ease of sailing rather than speed.
I think Kennedy had a "J boat" with modern sails also. That woulda hauled ina light to moderate wind