Test & measurement
Travelling The seven seas
itself. This combination has given rise to some interesting sports such as regattas. At the Vendée Globe 2020/2021, for
S
example, a non-stop, round-the-world regatta which only takes place every four years, a total of 167 solo sailors set off on the Clipper route. This route begins in Les Sables-d’Olonne (a town in western France on the Atlantic) and travels over the Atlantic Ocean to the Cape of Good Hope (South Africa). The route travels clockwise around the Antarctic via Cape Leeuwin (the most south-westerly point on the Australian continent) over to Cape Horn (Tierra del Fuego, southern Chile) and then back to Les Sables-d’Olonne. There are 44,000 km to navigate
between the months of November and February. The participants can moor themselves with an anchor, but not at a dock or next to another boat. Besides that, they receive no other external assistance (excluding weather updates or route information). Only if the participants encounter a problem early on, are they permitted to return to the beginning for repair and start again. The restart must, however, be within 10 days of the official start. The French-German skipper Isabelle
Joschke competed in this challenging race in 2020/2021 in her IMOCA boat, the MASCF. IMOCA boats can be fitted with a canting
keel (tiltable keel). The main performance benefit of this tiltable keel is that, when the keel is tipped to the side which is facing the wind (windward), the tilt of the boat is
ailing has existed as a means of transport for millennia and the spirit of sportsmanship is as old as humanity
reduced. In case of possible capsize, the boat can be righted again by tipping the keel to its maximum extent. Since 2014, canting keels are mandatory
in sailing races. The French company Hydroem delivers assembly kits for IMOCA boats which are fitted with this type of keel. The keel is activated with the 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. She can use this to power the distributor or, to save energy, make the keel sink down using a “release” button. The skipper Isabelle Joschke withdrew
on the 62nd day of the race due to technical problems. Unfortunately, even correct use of the KELLER sensors was unable to prevent this. At the time, she was in eleventh place and the 1st woman in the Vendée Globe race. Despite difficulties, Isabelle Joschke
delivered a noteworthy racing performance. She was driven by determination and mental strength as she was only one of six women who took part in 2020/2021 race. Her next opportunity will be in 2024.
KELLER
keller-druck.com
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February 2022 Instrumentation Monthly
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