[MHml] mast rake
sysfx at yahoo.com
Fri Nov 17 00:25:13 EST 2006
Larry Forgy wrote:
What exactly is the point of mast rake anyway?
Four reasons for raking the mast:
1) Balance (no need to explain that).
2) Allows to increase the foresail span while keeping mainsail span, at the expense of less usefull sail surface. Lift increases with span, so more span means more power.
3) Increase the efficiency of the mainsail roach (see Bethwaithe's drawing in his book)
4) Rotates upwards both sails' lift vecto. The upward component of lift raises the boat, allowing to plane earlier.
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