[MHml] mast rake

[Roy Mills]

At 09:38 AM 11/14/06, you wrote:

>2) The mast area is generally not rated sail area. This amounts to about
>38 ft^2.

         It is in Mocra, It is in Texel, it is in RORC.   Anyway you 
were not talking rating, you were talking an actual speed increase. 
Whether the rating adjustment will precisely offset that speed 
increase is another question. Wing masts just are more efficient than 
fixed, and it shows particularly on a reach when the side of the 
fixed mast is sending lots of turbulence over the leeward side of the 
sail. IMHO.


>3) Removing the stall zone seems to let me point a few degrees higher to
>weather without a lose in boat speed.

         It is said that wind tunnel tests indicate that the forward 
component of lift is greater in a wing masted sail that it is in a 
fixed mast sail, so better to windward too.


>4) Off the wind I added 2' to the luft of my spin. This lets me sail a
>bit deeper without a loss in speed.
>
>If you aren't racing it isn't something you can measure.

         But are we not always racing when sailing in the same 
direction as another sail boat? :-).
         Roy Mills