At the heart of Thomas Tison's concept is an electric foil control system. Sensors permanently record boat movements and wave patterns. Servomotors adjust the angle of attack of the foils in real time. Two lithium-ion batteries provide the necessary power with up to four hours of autonomy. The aim is a stable take-off, a controlled flight and therefore less physical effort. While the gliders of classic foilers usually have to regulate their altitude mechanically, the Airborn Foiler uses a microprocessor-controlled system for fine-tuning during the flight phase. The aim of the concept is for the sailor to concentrate on speed, feeling and tactics - not on permanent trim corrections.
Up to 30 knots speed
In terms of design, Tison relies on a low central T-foil. Profile flaps on the aft edge regulate the flight altitude. The balance is controlled by the elevators on the slim rudder blade, which are also equipped with attached flaps. The Airborn Foiler is said to be able to take off in six knots of wind under processor control and develops its optimum operating window between eight and 20 knots of wind. In optimum conditions, the aircraft, which weighs just 41 kilograms, should be able to reach speeds of up to 30 knots.
Sails are available in four different sizes to compensate for the weight of the helmsman. This range covers a body weight of 45 to 95 kilograms. The rig is also deliberately kept simple: two-piece mast and main boom made of carbon fibre and only four control lines on deck. Setting the mast and rigging should be possible in just a few minutes. A specially developed slip trolley and a simple line system for hauling the foils up and down make handling and launching easier. In short: less set-up, more water time.
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Ready to sail for 17,700 euros net
The Airborn Foiler is conceived as a one-design class and is offered as a fully equipped package. The construction made of glass and carbon composites is based on high-quality materials. Sustainable bio-composite technology is also used to reduce the ecological footprint of production. The first Airborn Foiler boats are apparently already under construction. Designer and manufacturer Thomas Tison has also already given an initial price indication. The ready-to-sail foiler costs 17,700 euros net. Including 19 per cent VAT, the purchase price is 21,060 euros.
Technical data Airborn Foiler
- Designer: Thomas Tison Design
- Hull length: 3.97 m
- Hull width: 1.54 m
- Weight ready to sail: 41.0 kg
- Sail area: choice of four sizes depending on body weight
- Construction: GRP/carbon fibre composite
Michael Good
Editor Test & Technology
