What it means
A foil kite is a type of traction kite characterized by its soft, fabric construction, which relies on ram-air inflation to achieve its aerodynamic shape. Unlike inflatable kites (leading edge inflatable or LEI kites), foil kites do not have an inflatable bladder. Instead, they feature a series of internal chambers that fill with air as the kite moves through the wind, much like a paraglider wing. This inflation gives the kite its structure and allows it to generate lift and pull.
Foil kites are particularly known for their efficiency, especially in lighter wind conditions. Their aerofoil profile is highly optimized, making them excel in disciplines like racing and hydrofoiling, where sustained power and upwind performance are crucial. There are two main types: open-cell foils, which have open leading edges and require constant airflow to maintain their shape, and closed-cell foils, which have one-way valves to trap air, allowing them to retain their shape even if they briefly fall into the water, making them more suitable for general freeride and hydrofoiling applications.
When flown, foil kites offer a different sentir compared to LEI kites, often described as smoother and more direct, with less 'jerkiness' in gusts. While historically more challenging to relaunch from water, modern closed-cell designs have significantly improved their water relaunch capabilities, though it still differs from the immediate relaunch possible with LEI kites.
Example on the water
On a very light wind day, the only kites visible on the water were a few foil kites, silently gliding across the surface, pulling riders on hydrofoils with impressive speed and efficiency, while LEI kites struggled to stay in the air.
Common mistakes
- ·Mistaking an open-cell foil for a closed-cell foil and attempting to water relaunch without understanding its design limitations.
- ·Ignoring the specific packing and depowering procedures for foil kites, leading to tangles or damage.
- ·Trying to learn on a foil kite in strong, gusty winds, where their efficiency can make them very powerful and less forgiving for beginners.
- ·Assuming all foil kites are for racing; many are designed for freeride and hydrofoiling, offering ease of use for general riding.
Why it matters
Efficient in light wind, racing and hydrofoiling.
Frequently asked questions
Are foil kites harder to relaunch than LEI kites?+
Historically, yes, especially open-cell foil kites which would fill with water. Modern closed-cell foil kites have improved water relaunch capabilities due to one-way valves that trap air, but the technique is different and can take more practice than with an LEI kite.
Why are foil kites often recommended for hydrofoiling?+
Foil kites are highly efficient and generate consistent, smooth pull, which is ideal for the low-resistance nature of hydrofoiling. Their ability to fly well in lighter winds also allows hydrofoilers to get on the water in conditions where traditional twin-tip riding might not be possible.
Can I use a foil kite for jumping and tricks like with an LEI kite?+
While you can jump with a foil kite, the feeling and timing are different. They offer excellent hangtime due to their efficient lift, but can feel less 'direct' for aggressive pop and unhooked tricks. Advanced riders perform amazing tricks on foils, but beginners might find LEI kites more intuitive for initial jump progression.