In Tactical Sailing's test with the AC40:
the true wind in the area was 12 KN, with a gust of 20 KN and the max. boat speed 44.6 KN (81.7 km/h) in the gust! See time stamps for Max: 44.6 KN at 1:47 and 2:18 min:sec. See: Coach's Toolbox:
https://www.tacticalsailing.com/en/co...