Saturday, October 23, 2010
November TSCA mtg
The regular monthly meeting will be held on Olympia at Penn's Landing. RSVP so i can get a head count.
Friday, October 22, 2010
Tuesday, October 19, 2010
Monday, October 18, 2010
Sunday, October 17, 2010
Saturday, October 16, 2010
Friday, October 15, 2010
Thursday, October 14, 2010
Wednesday, October 6, 2010
Oct TSCA
Pete Peters gave a good talk on sailing tactics. I nominated Ted for Pres, Frank for VP. Pul for Treas. Bill will con't as sec. Next mtg at the Dragon. Elections.
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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