ITYC

You must select the equipment (options and sails) equipped on your boat

This section is divided into 2 parts :

• Full pack : Activate all options and sails in 1 click!
• Foils : Activate / Deactivate foils option.
• Hull polish : Activate / Deactivate hull polish option.
• Light wind sails : Activate / Deactivate Light wind sails option pack ( LG / LJ ).
• Strong wind sails : Activate / Deactivate Strong wind sails option pack ( HG / SS ).
• Reaching sail : Activate / Deactivate Reaching sail option pack ( C0 ).

My router would make me change my sail for 1 hour? We have to go through an intermediate sail, is it useful?

Does the recovery coefficient cover these cases, and avoid this sail change and associated penalties?

ITYC.fr offers this tool allowing you to answer these questions in a few clicks!!!

This section is divided into 2 parts:

You have to set your conditions on the right side to get an update of the curves.

It is mandatory to enter the start and end TWS in the "correct" direction to get consistent results.

I.e., if you find that the wind is accelerating from 18 to 20 kts , you absolutely must enter 18 kts in the start value and 20 kts in the end value.

If you find that the wind is decelerating from 20 to 18 kts , you absolutely must enter 20 kts in the start value and 18 kts in the end value.

This is because the behavior of the sail cover is not identical to the acceleration or deceleration of the wind.

The curves represent boat speed in knots as a function of wind speed at the specified TWA.

The "Theo" curve represents the boat speed with the manually selected sail regardless of the overlap coefficient.

The "Auto" curve represents the boat speed with the sail selected automatically taking into account the overlap coefficient.

The hatched area corresponds to the overlap area of the sails.

For example,

From 1 , the spi (light green), recover the light gennaker ( orange).

Then part of the code 0 ( dark green) and the heavy spinnaker ( in dark red) from 2.

Finally from 3, the sail change will be effective, and the heavy spinnaker will be installed.

If you click on a curve name, you can show/hide a curve.

With your mouse wheel, you can zoom in on the curve.

With the left button of your mouse, you can move the curve after zooming.

Use the 'reset zoom' button to reset the display.

When hovering the cursor over the curve a toolbox like this one appears:

Wind speed ( knts ).

Boat speed ( knots ), sail, sail cover gain if relevant.

My router would make me change my sail for 1 hour? We have to go through an intermediate sail, is it useful?

Does the overlap coefficient cover these cases, and avoid this sail change and associated penalties?

ITYC.fr offers this tool allowing you to answer these questions in a few clicks!!!

This section is divided into 2 parts:

You have to set your conditions on the right side to get an update of the curves.

It is mandatory to enter the start and end TWAs in the "correct" direction to get consistent results.

That is, if you find that your TWA slips from 120° to 130° , you absolutely must enter 120° in the start value and 130° in the end value.

If you find that your TWA slips from 130° to 120° , you absolutely must enter 130° in the start value and 120° in the end value.

In fact, the behavior of the sail cover is not identical depending on the sign of the TWA variation.

The curves represent boat speed in knots as a function of windward angle at the specified TWS.

The "Theo" curve represents the boat speed with the manually selected sail without regard to the overlap coefficient.

The "Auto" curve represents the boat speed with the sail selected automatically taking into account the overlap coefficient.

The hatched area corresponds to the overlap area of the sails.

For example,

From 1 , the spi (light green), recover the light gennaker ( orange).

Then part of the code 0 ( dark green) and the heavy spinnaker ( in dark red) from 2.

Finally from 3, the sail change will be effective, and the heavy spinnaker will be installed.

If you click on a curve name, you can show/hide a curve.

With your mouse wheel, you can zoom in on the curve.

With the left button of your mouse, you can move the curve after zooming.

Use the 'reset zoom' button to reset the display.

When hovering the cursor over the curve a toolbox like this one appears:

Wind angle (°).

Boat speed ( knots ), sail, sail cover gain if relevant.

Want to visualize the area of ​​use of a sail according to the true wind speed (TWS) and the true wind angle (TWA) ?

ITYC.fr offers you this tool !!!

This section is divided into 2 parts :

You must set your conditions in the right part to get an update of the curves.

The curves represent the min and max wind angle (TWA) limits in degrees in knots depending on the wind speed for a given sail.

The "Max TWA" curve represents the wind angle limit (TWA) beyond which the sail will have to be changed (covering included).

The "Min TWA" curve represents the limit of angle to wind (TWA) below which the sail will have to be changed (overlap included).

If you click on a curve name, you can show/hide a curve.

With your mouse wheel, you can zoom in on the curve.

With the left button of your mouse, you can move the curve after zooming.

Use the 'reset zoom' button to reset the display.

When hovering the cursor over the curve a toolbox like this one appears:

Wind speed ( noeuds ).

True wind angle max ( ° ) , boat speed ( knts ).

True wind angle min ( ° ) , boat speed ( knts ).