ChatPolaires

Select a boat from the list below, then select the sails and boat options you want to consider, and enter True Wind Speed (TWS), True Wind Direction (TWD), True Wind Angle (TWA) and a Target Bearing.

Boat :

Loading boat list...

Sails :

Select a boat first.

Options :

Polish (Hull) Foils Winch Pro Magic Furler Jacket

True Wind Speed (TWS, knots):

True Wind Angle (TWA, degrees):

True Wind Direction (TWD, degrees):

Target Bearing (degrees):

Tip: Click on a legend item to show or hide the corresponding curve.
Yellow background areas indicate potential boost zones.

Speed (at Given TWS & TWA):

Best Speed: -

Optimal TWA (at given TWS):

Optimal TWA @ - kts: -

Speed: - Voile: -

Optimal VMG Up (at given TWS):

Optimal VMG Up @ - kts: -

Optimal TWA: - Speed : - Voile : -

Optimal VMG Down (at given TWS):

Optimal VMG Down @ - kts: -

Optimal TWA: - Speed : - Voile : -

Optimal VMC (at given TWS, TWD, Bearing):

Optimal VMC @ - kts TWS, -° TWD towards -°: -

Optimal Heading (HDG): - TWA: - , Speed: - Voile : -

Boost Zones (at Given TWA):

Maneuver Speed/Time Penalties:

Calculated speed reduction and duration for standard maneuvers using Speed found above at Speed at Given TWS & TWA. Based on 'winch' data in polar file.

Tack Penalty:

Base Speed Used: -

Adjusted Speed during maneuver: -

Penalty Duration: -

Speed Ratio Applied: -

Energy Loss: -

Gybe Penalty:

Base Speed Used: -

Adjusted Speed during maneuver: -

Penalty Duration: -

Speed Ratio Applied: -

Energy Loss: -

Sail Change Penalty:

Base Speed Used: -

Adjusted Speed during maneuver: -

Penalty Duration: -

Speed Ratio Applied: -

Energy Loss: -

Speed/Time Penalty Calculation details will appear here.

ChatVir - 2005