Table of Contents Upwind Sailing


Part II: Over-Rotating Through Tacks Classroom Activity - 30 minutes


1. Have students read Learn Sailing Right! Beginner, Chapter 12. Then ask, “Can anyone tell me how many degrees are in a straight line, a circle, and a triangle?” “What is a supplementary angle? ( two angles that add up to 180°). When you sail in a straight line, what is the angle of that line? (180°) If you tack making a 90° turn, what is the complementary angle?”.


2. When a sailor over-rotates on a tack, does it increase or decrease the angle to the wind?


3. Pass out Student Sheet 2. Tell students, “Using a ruler and a protractor draw a race course with a windward leg of 1,000 feet. The sailor is over-rotating by 30°, so each tack is 120°. Rounding to the nearest inch, calculate the perimeter of this new course.”


4. How much further does a sailor travel when sailing with 120° tacks than the sailor with 90° tacks?


5. If you over-rotate on three tacks making your angle 120 degrees, how much further did you sail?


Part III: Pulling it All Together On the Water - 90 minutes


1. Set up the race course. 2. Use a modified starting sequence of 1 minute.


3. Put ½ the boats on the over-rotator team and ½ on the 90 degree tacker team. Those on the over-rotators must over-rotate by exaggerating their tack by a few seconds to point their boat past 90 degrees, stopping at approximately 120 degrees. The 90 degree tackers must attempt to make perfect tacks while sailing upwind.


4. Running a minimum of 3 races have teams alternate for the first two races and then have everyone sail for themselves for the last race.


5. This works best using trained staff to skipper on bigger boats.


RESOURCES Learn Sailing Right – Beginner


Start Sailing Right! Chapter 12: Upwind Sailing pages 40-41 US Sailing 2012 Portsmouth, Rhode Island


The Symmetry of Sailing: The Physics of Sailing for Yachtsmen By Ross Garrett available through Amazon.com


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