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Profile for thorenj



Name thorenj
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Posts3
  • 2013-03-13 12:06:30
    Re: Extrapolating boat performance
    Board » Technical Support
    I only have some limited experience working with polars, mainly from my bachelor's thesis in hydrodynamics, but i would suggest something along the lines of:

    BS(TWS)=BS(max polar TWS)+(TWS/(max polar TWS))x((max polar TWS)-(2nd max polar TWS))

    Hope I got that right... ;-)

    /thorenj

    --- Last Edited by thorenj at 2013-03-13 12:06:55 ---
  • 2013-03-10 13:24:42
    Re: Extrapolating boat performance
    Board » Technical Support
    Yes, obviously reefing will be important, but:

    a) As far as i know, reefing is already incorporated in the (nature of) polars, the boat speeds on beating wind angles seems to indicate this.

    b) The boat speed gets "stuck" to the maximum speed of the polar plot graph. Coincidence?

    Since we obviously can't have polars for infinite wind speeds, I believe that extrapolating the highest plotted wind speed will be the most accurate simulation. To improve realism, maybe the extrapolation could in fact be interpolation, but "above" the highest comparing value, to incorporate said reefing and wind angle-dependent factors.

    best regards,
    thorenj

    --- Last Edited by thorenj at 2013-03-10 13:31:57 ---
  • 2013-03-08 14:24:16
    Extrapolating boat performance
    Board » Technical Support
    Hi all - SOL developers in particular!

    As you may have noticed, in the current NYC-SFO race we have had stronger winds than those represented in the boat polar. When I took a closer look at what performance I got in winds of 40 knots or above, it seemed to me that the race server does not extrapolate boat speeds above what can be plotted in the graph in the client. Has anyone else experienced this? If this is an accurate observation, can it be rectified?

    best regards,
    thorenj

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Tall Ships 2026 - Harlingen to Antwerpen


Welcome to the second of four virtual Tall Ships Races in European waters which are concurrently being organized in-real-life by Sail Training International . This second race is from Harlingen in Friesland down along the coast of Holland and Friesland to Vlaanderen’s famous port of Antwerpen – circa 150nm in Sailonline’s classic Clipper 240.
NOTE: Starts and Finishes in tall ships racing are always offshore to avoid conflict with shipping and shipping lanes; online and real-life may not match exactly.
Race #1993
INFO by brainaid.de
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Alaska to Easter Island 2026

Welcome to yet another all-new series. The initial leg of the RNW (Round the New World), Alaska to Easter Island, also part of our Ocean Championship. The first race of OCQ3 2026. This race will be sailed in our revised 'version 2' Imoca 60 Foil. Race #2042
INFO by brainaid.de
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Ranking: OCQ3 - RNW - OCCH - SYC
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Cross the Convergence 2026 - Sao Tomé to Tristan

The fifth race of our series of ocean voyages across the World’s convergence zones takes us back south down the Atlantic from Sao Tomé on the Equator to Tristan da Cunha on the edge of the Roaring Forties. It’s 2500nm; in your path the Benguela winds and current along the south west African coast, and behind that the St Helena High stretching halfway to South America. So, mind where you go in your Volvo OD65 version 3 (based on sampled real-life race data by kroppyer)!
Race #1985
INFOby brainaid.de
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Race starts: Jul 03rd 18:00 Registration Open!
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New Ice Age 2026 - Neumayer Station to Scott Base


For a second-half of long-distance ice-boating, we take our DNs to Antarctica for a circumnavigation of that continent in two legs clockwise, in harmony with the prevailing winds (such as there are), beginning with a race from Germany’s Neumayer Station to New Zealand’s Scott Base. It’s about 3500nm, which, if there’s wind at all, should, well-wrapped in your DN-cockpits, not take you much more than five days. And remember: charts down here are unreliable – what is land and what is ice?!
Race #1970
INFOby brainaid.de
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Race starts: Jul 02nd 07:00 Registration Open!
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Tall Ships 2026 - Aarhus to Harlingen


Welcome to the first of four virtual Tall Ships Races in European waters which are concurrently being organized in-real-life by Sail Training International . The course for this first race is from Aarhus in Denmark, through the Skaggerak and down the North Sea to Friesland’s Harlingen – a proper tall ship training adventure of circa 450nm, which online this year you will race in Sailonline’s classic Clipper 240.
NOTE: Starts and Finishes in tall ships racing are always offshore to avoid conflict with shipping and shipping lanes; online and real-life may not match exactly.
Race #1992
INFO by brainaid.de
Clipper 240 PARTICULARS
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Race starts: Jun 27th 16:00 Registration Open!
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Viareggio Bastia Viareggio 2026

Our sixth race of nine to celebrate all things Mediterranean - fickle winds, history and olive oil - was planned to be our third buddy-up with another incredible Italian event, the Viareggio Bastia Viareggio (or BVR for short). Unfortunately, in-real-life the BVR has been cancelled this year. But online we shall race it never the less. It’s a quickie – a 160nm roundtrip there-and-back in classic Class 40. Have fun, and if you’re planning a BBQ, piccola isola Capraia halfway across is simply lovely!
Race #2041
INFO by brainaid.de
Class 40 PARTICULARS
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Ranking: MED - SUPBUD - SYC
RACE CLOSE: Sunday,
July 5 at 2300 UTC.
Race starts: Jun 24th 12:00 Registration Closed

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Newport Bermuda Race 2026


The 636-mile Newport Bermuda Race is one of the oldest regularly scheduled ocean races, and with the Fastnet and the Sydney Hobart Race, it is one of the three great classic races of the yachting world. First raced in 1906, now in its 54th biennial, the Race can again also be participated in online. In real life, the race is open to entry in four different division – Double-Handed, St. David's Lighthouse, Gibbs Hill Lighthouse, and Finisterre Division – which in the past we have also offered online. This year, however, our online race will be all-in one-design in silky swift Club Swan 50 yachts, so that your results can count towards SOL’s SUPerBUDdy title, whilst hopefully still giving you a chance of overall line honours against the fastest yachts of the real-life Gibbs Hill Division, especially if you can find some forecast winds that don’t quite work out that way on the real water!
Race #2038
INFOby brainaid.de
Club Swan 50 PARTICULARS
WX Updates:
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Ranking: SUPBUD - SYC
RACE CLOSE: Wednesday,
July 1 at 2300 UTC.
Race starts: Jun 19th 17:05 Registration Closed
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Bluefin Tuna - Mexico Gulf to North Sea 2026

Join us and follow the Bluefin Tuna, as they migrate from their spawning grounds in the Gulf of Mexico to their feeding grounds in the North Sea off the coast of Norway. This 4300 nm race is part of our Ocean Championship and the final race of OCQ2 2026, and also the second leg of our Migration series. We will be sailing in our Gunboat 90. Race #2035
INFO by brainaid.de
Gunboat 90 PARTICULARS
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Ranking: OCQ2 - MIG - OCCH - SYC
RACE CLOSE: Saturday,
July 4 at 2300 UTC.
Race starts: Jun 08th 11:00 Registration Closed
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