12 july 2005

13
12 July 2005 Ultimate Sailing Ultimate Sailing Stephen Bourn www.wingbornehydrofoil.com

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Ultimate Sailing. Stephen Bourn. 12 July 2005. www.wingbornehydrofoil. com. Velocity triangle. Boat velocity. Apparent wind angle 30 . True course. b. g. Apparent wind. True wind. Aero force. Hydro force. e A - aero drag angle. e H - hydro drag angle. f A - aero elevation - PowerPoint PPT Presentation

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Page 1: 12 July 2005

12 July 2005

Ultimate SailingUltimate SailingStephen Bourn

www.wingbornehydrofoil.com

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Apparent windangle 30 True

course

True wind

Apparentwind

Boat velocityVelocity triangle

Page 7: 12 July 2005

Gravity force

– apparent wind angle

H - hydro drag angle

H - hydro elevation angle

A - aero drag angle

A - aero elevationangle

Aero force

Hydro force

Air velocity

Water velocity

Page 8: 12 July 2005

True wind velocity

IH – projectedhydro drag angle

IA – projectedaero drag angle

A

A

HH

H

H

A

A

cos

sinarcsin

cos

sinarcsin

– true course

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H

H

A

A

cos

sinarcsin

cos

sinarcsinmin

speedmax