Join Date: Apr 2011
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Re: Bob Perry's take on Wolfenzee's dream boat
Forget upwind and downwind. Just imagine shoving a shape through the water.
If you fix LOA and let beam grow the boat will not only get beamier but heavier also.
Wetted surface increases, frontal area increases and displ increases.
When I draw a new boat one of the very first things I do is figure out just how narrow I can make the boat. Narrow boats behave nicely and have less assymetry to the waterlines when heeled.
If you look at any of the rating rules going back to the CCA you will find beam on the "slow" side of the equasion, beam and displ make a boat slow. Think of all the famous downwind flyers: Santa Cruz 70, RAGTIME, PYEWACKIT, Andrews 70 etc, they are all narrow boats. The only downwind flyer I can think of that wasn't narrow was WINDWARD PASSAGE and it's L/B was 3.8 and that's far from beamy.
I hear ya there Bob. I got a tour of Rage a couple of years ago when she was tied up in Alemeda.Despite being 70' she seemed very simple and manageable. I would have loved to go out for a sail but no joy that day.