Karl,
If you do build a Swift. You shall call it ³Salubrious Effects².
Yep, I like that.
When are you starting, ah.
Dave L.
David E. Lindsey, C.O.
Lindsey Composites, Inc.
Unit 211, 13308 - 76th Ave.
Surrey, B.C.,
V3W 2V9
Phone (604) 970-2777
Instant messaging-
compositebrace@xxxxxxxxxxxxxxxxxxxx
Regular email with graphics-
lindsey@xxxxxxxxxxx
Home phone (604) 525-8494
> All good ideas. The one thing I would add about the bear off it helps if
> you start out sailing a bit loose (footing). Then bear off only about 45-70
> degrees (ie to just past beam reach) and let the boat accelerate even more.
> Once the boat is up to scary speed, then bear off the rest of the way or
> alternatively two-sail reach at 110 -120 degrees off the wind. The two-stage
> bearoff has three salubrious (positive) effects:
>
> 1) it allows the boat to accelerate before the full downwind load is
> placed in the bow thus reducing the force pushing the bow down
> 2) a faster boat generates more lifting power out of the hull so it
> gives the bow shape more power to lift out of the water (buoyancy during the
> initial stage 1 bear off and planning lift during the latter bear off)
> 3) it reduces the loads on the rudder by reducing the weather helm
> force of a buried lee-bow, you reduce the force on the rudder, plus since you
> are bearing off a bit less, you don¹t crank the rudder as hard over which in
> turn reduces the loads.
>
> The real gotcha is the puffs you were facing. It sounds like you had 20kn
> steady with 15-20+kn gusts (that would explain the 20 degree shifts velocity
> shifts). Hammering gusts like these place maximum loads on EVERYTHING
> especially the mast. In fact I¹d take the time before the next sail to check
> everything on the mast ³just in case²..
>
> Another thought on the rib. Bram what do you thin of inlaying a 1?4² or 3/8²
> carbon kite batten into the foam on both sides? This isn¹t quite the full
> cross sectional rib, but it provides the surface stiffness.
>
>
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