Racing Results
The first race of the 2010 America's Cup took place on February 12, 2010. USA 17 beat the defender, Alinghi 5. USA 17 was behind 1:27 at the start, but was ahead by 3:21 at the windward mark and by about 9 minutes at the finish. Her official finish time was 15:28 ahead of the loser because Alinghi 5 had to perform a penalty turn, having failed to stay clear at the start.
Winds were 5–10 knots (9.3–19 km/h; 5.8–12 mph). USA 17 reached the windward mark in 1h29, so her velocity made good was about 13.5 knots (25.0 km/h; 15.5 mph), or about 1.8 times wind speed. USA 17 took 63 minutes to reach the downwind mark, so her velocity made good downwind was about 19 knots (35 km/h; 22 mph), or about 2.5 times wind speed.c
The measured wind velocity is taken at near sea level, and does not account for effects of wind gradient with reported true wind speed of 15 knots (28 km/h; 17 mph) at mast head height of over 60 metres (200 ft). The measured sea-level wind direction shifted away from 180 degrees between the time of setting of the course and commencement of sailing of the downwind leg, by which time wind direction was reported to be at around 160 degrees. As such the ratio between downwind velocity made good and wind speed is an approximation only.
On February 14, 2010, USA 17 also won the second race, and thus the America's Cup, again by a considerable margin. USA 17 was ahead by 0:24 at the start, by 0:28 at the windward mark, by 2:44 at the gybe mark, and by over 4 minutes at the finish. Her official finish time was 5:26 ahead of the defender because Alinghi 5 had to perform a penalty turn, having entered the pre-start area too soon.
Winds were 7 to 8 knots (13 to 15 km/h; 8.1 to 9.2 mph). USA 17 reached the windward mark in 59 minutes, so her velocity made good was about 13.2 knots (24.4 km/h; 15.2 mph), or about 1.65 times wind speed. The course was a triangle, so the velocity made good downwind was only 11.5 knots (21.3 km/h; 13.2 mph), or about 1.4 times wind speed. USA 17 averaged 26.8 knots (49.6 km/h; 30.8 mph), or about 3.6 times the wind speed, on the faster first triangular leg.
Observers stated that the rigid wing had given USA a decisive advantage.
Read more about this topic: USA 17 (yacht)
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