15
Imagine a boat resting in the water with no sails rigged. Underwater, the keel or centerboard
acts as a fulcrum, called the Center of Lateral Resistance (CLR, indicated by dotted line in
illustrations on the top of the next page) somewhere near the center of the boat. If you were
to push against the bow from the starboard side, the boat would turn toward the port, rotating
on that fulcrum (figure 1). Conversely, if you push on the stern from the starboard side the
boat will turn toward the starboard side (figure 2).
These forces can be duplicated using the sails. With only the mainsail rigged, and the wind
blowing across the starboard side, the boat will turn toward the starboard side (figure 3). This
is because the position of the mainsail is generally aft of the CLR, and the wind causes the
mainsail to apply force behind that axis. With only the jib rigged and sheeted in, the same
force is applied forward of the axis, and the force of the sail will push the bow away, as if you
were pushing the bow with your hand (figure 4).
Figure 1
Figure 2
Summary of Contents for HUNTER 25
Page 55: ...Power Squadron recommendations for maintenance and safe boating PAGE 13A 11...
Page 56: ...Local sailing club or marina s recommendations for maintenance and up keep PAGE 13A 12...
Page 58: ...Spare parts list PAGE 13A 14...
Page 59: ...Dates of practice drills and onboard safety inspections PAGE 13A 15...
Page 60: ...MY PERSONAL PREFERENCES FOR MAINTENANCE ITEMS SAFETY GEAR PAGE 13A 16...
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