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Archive for the Wind Instruments Terminology Category

What is Vmg

What is Vmg

Maximizing Vmg helps you win Vmg strands for Velocity Made Good. It is the component of your speed in the direction of the true wind. This is the number that you want to maximize to get to windward as fast as you can. There is also a

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True wind

True wind

True wind speed and direction are the drivers of your boat The wind you feel onboard a moving boat is a combination of true wind and boatspeed (the apparent wind). By solving the wind triangle, true wind speed and angle is obtained from the measured apparent wind,

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Measuring Wind Direction: What is Upwash?

Measuring Wind Direction: What is Upwash?

Here’s a term that is bandied about in measuring Wind Direction, but is commonly misunderstood: upwash. Many people think they understand what it is, but are wrong by 90 degrees. What do I mean by that? Most people hear the term upwash and take it for face

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Measuring Wind, and Understanding Wind Shear

Measuring Wind, and Understanding Wind Shear

Understanding wind shear and gradient Wind shear… it’s that mysterious quality of the wind that can make or break your strategy in a race. Many people measuring wind refuse to believe in the existence of wind shear, never mind its effects on sail trim. Much has been

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