[Public-List] replacement spreaders

[Don Campbell]

Roger,  just be aware that F.W. Kay in his book, The Science of Yachts,  
Wind, and Water, on page 63 shows the wind resistance for a tapered form 
with the nose a semi-circle and teh tail tapered to a point, the taper 
out of the wind,  as 1 and the reverse, so the taper to the wind, as 
1.6. While you may not think it,  fish are smart and have their tails on 
the correct,  trailing edge. Evolution does work for some things in 
water and fluids like air.  (One gets a value of 1 for a circle as 
well,  but the diameter of the circle that does have a value of 1 is 
1/10 the the diameter of the tapered shape.
     Time to reverse the spreader's direction, that is  if you want a 
faster boat, or at least no obvious  slow downs.
Don

On 6/3/2011 12:03 PM, Roger L. Kingsland wrote:
> Michael,
>
> This is easy for me because, it just so happens, both tapers (in plan and
> cross section) face the same way which, for now, is forward.  Good Lord
> willing and the creek don't rise, it will contribute to a fast boat.
>
> Best, Roger
>
> PS - Has anyone replaced wood spreaders with aluminum; if so, who did it and
> how dear was it?
>
>
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