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Profile for Chappo



Name Chappo
Email Address peter@mindmechanics.com.au
AvatarUsers avatar
Posts53
  • 2012-05-24 23:23:08
    Re: Minor Beta update 23 May
    Board » Technical Support
    Aaron
    There seems to be no limit to the clever, convenient enhancements you keep adding. Your Optimum Angles tool saves me a lot of computing time, many thanks (and my wife says thanks too!)
  • 2011-12-12 03:18:44
    Re: SOL World Race: Leg 2 Analysis
    Board » Flag Officers » Races
    I have been tweeting Askel Magdahl, the navigator on Sanya who pulled off that clever passing move to win the Rio leg of the last Volvo race on Eriksen 3. He said he uses Expedition and Deckman plus some of his own routing software. I wonder what course he is working on for this Dhabi leg??
  • 2011-11-21 02:22:01
    Re: General System Spec - to aid SOL development
    Board » Technical Discussion
    3 year old desktop, 19 inch screen accessing via Firefox

    Microsoft Windows XP Professional
    Intel Core2 6400 2.13GHz @ 2128 MHz
    Graphics Card: 256MB ATI Radeon X1300PRO

    2046 MB System RAM (Score: 104)
    - RAM Speed: 3191 MB/s

    CPU Tests (Score: 210)
    - Floating Point Operations/Second: 50669288
    - Integer Operations/Second: 123177326
    - MD5 Hashes Generated/Second: 710277

    Graphics Tests (Score: 33)
    - 3D Frames Per Second: 112

    Hardware Tests (Score: 10)
    - Primary Partition Capacity: 298 GB
    - Drive Write Speed: 11 MB/s

    Nova Bench score 354

    Internet download rate 1.78 Mbps

    Screen resolution 1280 by 1024
  • 2011-06-02 11:00:39
    Re: Gain or loss by using TWA
    Board » Technical Support
    How do you find time for work Aaron, you have been very busy creating tools, updating your blog, being very competitive in SOL and now working on SOL development! That sounds like a very flash tool you are working on so I will keep an eye on your blog. Thanks for your great work.
  • 2011-06-02 04:25:14
    Re: Gain or loss by using TWA
    Board » Technical Support
    *8MR, I am not an IT guru but wouldn't these choices be made by the SOL server when you are looking at the forum and perhaps it is configures any large attachments that cannot physically be displayed in the message as attachments only.
  • 2011-06-02 02:58:29
    Re: Gain or loss by using TWA
    Board » Technical Support
    8MR, I see the diagram embedded in the post and as an attachment too?
  • 2011-06-02 02:54:50
    Re: Gain or loss by using TWA
    Board » Technical Support
    Excellent summary 76. I presume it is not to scale but broadly highlights the distance differences. It certainly makes a good case for twa but as Aaron notes, just because the fast yachts have curved tracks, often actually reflects continuously adjusting VMC sailing rather than TWA sailing.
  • 2011-06-02 01:46:19
    Re: Gain or loss by using TWA
    Board » Technical Support
    Good points Aaron, it is easy to work with confidence when plotting within 6 hour weather cycles, much more challenging after 6 hours so CC is a safe option. We have all seen some big shift between weather updates. I note you mentioned you have written a small tool that calculates both max VMG (for upwind & downwind) for a given TWS – , and also maximum VMC given input of TWS, TWD and a CC to the waypoint. Does it link to an uploaded polar or does it just require manual input based on different angles and BS from the polar at the time you choose to do a calc. Is that tool available for download somewhere? I use my simple worksheet attached for my max VMC calcs. I find it pretty good downwind, can be misleading upwind.
  • 2011-05-30 23:14:02
    Re: Can't get rankings and race leaderboards
    Board » Technical Support
    Thanks Jack. Yep I am on the work computer where I am getting the Leaderboard and Rankings. I will check my home PC.
  • 2011-05-30 02:50:42
    Re: Gain or loss by using TWA
    Board » Technical Support
    I have taken advantage of the speed difference of CC or TWA in different races and yachts. I am not an expert but I think the differences come from various factors such as the shape and position you are sailing on the polar, whether you are sailing into a heading or lifting wind change and whether you are going upwind or downwind. So even though the CC is a shorter course, that advantage can often be offset by the fact that the last part of the CC course is so much slower than the TWA course (when sailing upwind into a header, or at the start of a CC course into a freeing wind change, the CC course is much slower than the TWA course.

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Marstrand to Cowes 2025


We invite you to another race, which will kick off the third quarter of our ARCH series. We'll set off from Marstrand, Sweden, which, along with Skagen, Denmark, marks the line commonly recognised as the border separating the Baltic Sea from the North Sea. The 650nm route will take our Ripitide 50 across the North Sea and the English Channel to Cowes, England. Watch out for the fast ferries crossing the Channel from Calais to Dover 😊.
Race #1935
INFO from brainaid.de
Riptide 50 PARTICULARS
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0430 / 1030 / 1630 / 2230
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Race starts: Jul 28th 17:00 Registration Open!
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Sinbad by Balloon 2025 - Baia de l'Oiseau to Carnarvon


How ever shall I return to report with clarity to my Great Sultan – asked Sinbad. It needs be told this island and all its fables shall be expunged from the annals of every thousand and one night. The wind howls – and sun be none (it’s Winter, Sin’bro, ed.) – and all days from the west, but let’s launch anyway and see if we can work our SOL Balloon north as the days pass aiming for Asthralaya, where The Mahabharata tells the ancients once tested mighty weapons, about a quarter and a million qasbah away (2500nm, ed.), perhaps one month.
Race #1885
INFOby brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - SBB
Race starts: Jul 23rd 11:00 Registration Open!
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Tall Ships Races 2025 - Aberdeen to Kristiansand


Welcome to the third of four virtual Tall Ships Races in European waters which are concurrently being organized in-real-life by Sail Training International . This third race is from Aberdeen in Scotland east across the North Sea to Norway’s Kristiansand; circa 330nm in Sailonline’s magnificent 90m Barque.
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 #1925
INFO by brainaid.de
Barque 90m PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TS - SYC
RACE CLOSE: Wednesday,
July 30 at 2300 UTC.
Race starts: Jul 22nd 16:00 Registration Open!
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Suursaari TIMED Race 2025

The first TIMED race of the northern hemisphere Summer takes us to the Gulf of Finland on a 165nm zig-zagging course beginning and ending in the seacoast village of Haukilahti and circling the island of Suursaari. It’s only appropriate that the boat for this race is Finland’s own Club Swan 50. This is a TIMEDrace so you may RE-REGISTER HEREto try again after finishing a run. You will have 13 days and 11 hours to test your skill and decision making after the race opens.
Race #1928
INFOby brainaid.de
PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
26 July at 23:00 UTC
Race starts: Jul 13th 12:00 Registration Open!
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Young Island to Great Nicobar 2025

The adventure continues as we launch this fifth leg of the RWW series, racing from Young Island to Great Nicobar on the edge of the Bay of Bengal. Get ready for a chilling start as we set sail on the seventh leg of the 2025 Ocean Championship Series! A 5200nm journey of endurance, strategy, and pure sailing excitement. This leg will be pursued aboard the Super Maxi 100v2, pushing sailors to their limits. Do you have what it takes to conquer the Indian Ocean? Join us and put your skills to the ultimate test!
PRIZE: SMPF
Race #1929
INFO by brainaid.de
Super Maxi 100 v2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ3 - RWW - OCCH - SUPSOL - SYC
Race starts: Jul 07th 11:00 Registration Closed
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