Presentation: “Efficient Catboat Sailing Skills”, by Pete Peters (Lecture 1 of 2)
- Key parameters:
o Length
§ Hull speed = √(Length in Feet) x 1.34
§ Disproportionate energy needed to exceed hull speed
§ “make boat as long as possible”
o Weight
§ Lighten as much as possible
§ Inertia hinders acceleration
§ Greater wetted surface = drag
§ Center as much as possible
§ Remove water in the boat – bail!
o Lift
§ Bernoulli’s principle – air moving over curved surfaces
§ Lift off wind
§ Lift found in sail, centerboard, rudder
§ Rudder – a little weather helm generates lift
o Balance
§ Center weight in boat
§ Maximize waterline, maintain level (fore/aft and port/starboard) by shifting crew and content weight.
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