Sailing has been a means of transport for millennia, and the spirit of sportsmanship is as old as humanity itself. At the Vendée Globe 20-21, a non-stop, round the world regatta which takes place every four years, a total of 167 solo sailors started on the Clipper route. Entrants navigated 44 000 km between November 2020 and March 2021. Regatta rules allowed participants to moor with an anchor, but not at a dock or next to another boat. Besides that, they received no other external assistance.
The French-German skipper, Isabelle Joschke set sail in this challenging race in November 2020. Her boat was fitted with a tiltable keel so that when the keel was tipped to the windward side, the tilt of the boat was reduced. In case of possible capsize, the boat could be righted again by tipping the keel to its maximum extent. These keels are mandatory in sailing races. The French company Hydroem delivers assembly kits for boats which are fitted with this type of keel.
The keel is activated with a hydraulic cylinder built into the floor of the boat and connected to the keel. The distributor is between the hydraulic group (electric motor, hydraulic pump and oil tank) and the hydraulic cylinder. This contains electrical valves needed for controlling the hydraulic pressure. The Keller Sensor 21Y is also connected to the distributor, and measures the pressure of the keel cylinder. The skipper can influence the system and keel directly using a control box, using this to power the distributor or, to save energy, make the keel sink down using a release button.
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Image copyright: Jean-Marie LIOT.
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