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Hydrofoils

Concept:  the first heeling trim hydrofoils;

Hydro foils, choices….

The speeds Kitetender 400 can reach,  go above 20 knots on flat water. The low heeling momentum is due to that.

In small winds, say 12 knots, a good crew can reach 12 knots of bootspeed, just by flying a 18m2 race kite properly.

In waves, slowing down is sometimes a must,  due to spray reducing view or crew can’t keep up.

 

Being above the water would help to remain a view and have a more easy flight. So flying just above the water on hydrofoils would be nice.

However if the kitetender is going to be flying above the water, the heeling momentum will increase.

To remain the low heeling momentum, Kitetender would need a wider platform or some kind of heeling momentum control system.

 

Hydrofoils Contra’s

Hydrofoils shapes are up till now fixed shapes. It means that each shape is suitable for a certain speed range. If you want to go faster than 25 knots, you would need another profile then foiling from 8 to 15 knots.

Each hydrofoil has its own characteristics and limits. Like airplanes do with their wings.

As mostly hydrofoils are to be made in carbon, again it would be very costfull to develop a system.

Perhaps only a foiling rudder will reduce drag and resistence enough allready, to add 5 knots extra boatspeed.

 

How to start from beaches then, or arriving?     …To be continued….