Tim Weston Boats
- Tokyo Express
- Small Boats
outperforms two smaller ones. Go as hard to wind as a keel yacht—but faster.
Vortex losses around the bottom (tip) of a daggerboard make up a considerable percentage of the total drag. Why have two? Combining two boards into one big one means a longer chord, a higher Reynolds number and lower induced drag. The board operates at low angles of attack giving a higher Lift/Drag ratio, less side slip and better steering.
When I relaunched my cat with the new board, it was a different boat—completely. I could go upwind like a tractor at angles I’d never seen before—and fast. But I could also slow down and still go upwind as good as any keel yacht when the weather got rough.
Steering was light even in the heaviest of conditions, the boat tracked like it was on rails. Asymmetric drag is undetectable. Raising or lowering the board while running downwind, makes no difference to the speed or helm.
Building one daggerboard and case is quicker than making and installing two. And as a bonus, you have full use of the other hull—a perfect place for the galley.
The board has been in use for the last 21 years and still looks like the day it was built. Despite hitting the bottom (and coming to a dead stop from 5kts) when I owned the boat and plenty of stormy weather sailing over the years. Living proof of the excellent strength and more importantly fatigue strength, of wood, epoxy and e-glass. This board is designed strong, it will outlast your boat.
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