Americas Cup Apparent Wind

Apparent Wind on Americas Cup AC72’s   BTW – please “Like”this article using your favorite social media accounts – thanks for that. See here for the TV Schedule for all countries. Who’s taking it home? AmericasCup.com So how do they do it? I was watching it on Sunday – the wind was at about 15 […]

The Wind Triangle: Apparent Wind vs True Wind

Apparent wind is a vector summation of the boat velocity and the true wind velocity.This animation shows how the apparent wind changes with boat angle to the wind given no change in boat speed and true wind velocity. Sailing concepts like this are discussed in depth in our NauticEd Skipper Course. Click on the various […]

Stopping Rounding Up Dead in it’s Tracks

Rounding up is caused by many factors. One is too much wind and force aloft which tends to heel the boat over. This reduces the amount of rudder in the water and thus the rudder’s effectiveness. Another factor in rounding up is the center of pressure of wind on the sails is too far aft […]

True Wind versus Apparent Wind

We took this from a section in the Crew and Skipper Courses to easily explain the difference between true wind and apparent wind. >>>>>> Section 7.2 – True Wind versus Apparent Wind – Explained Put you hand outside the window of your car traveling at 60 miles per hour on a still day and your […]

Further elaboration of true vs apparent wind

There has been a request for further elaboration of the wind vectors as to why the true wind is always behind the apparent wind. Previously we used this diagram and the confusion is that the true wind vector is in front of the apparent wind vector. The following diagram explains the vectors better perhaps. The […]

Understanding true vs apparent wind

Here is an easy description of true wind and apparent wind. Put you hand outside the window of your car traveling at 60 miles per hour on a still day and your hand will feel a 60 mile per hour wind. That’s apparent wind yet the true wind is zero. What if the car was […]