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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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Raja Muda Selangor 2025 - Pangkor to Penang

Welcome back on board your J-109 for our second online offshore race in cooperation with the Raja Muda Selangor International organisation – an 80nm trip from Pangkor north up the Malacca Strait to Penang.
Race #1962
INFO by brainaid.de
J-109 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RMS - SYC
Race starts: Nov 17th 04:00 Registration Open!

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Raja Muda Selangor 2025 - Port Klang to Pangkor

Sailonline is delighted to be able to offer online sailors an opportunity to once again compete in all three of the offshore races of the Raja Muda Selangor International race week, organised by the Royal Selangor Yacht Club in association with the RORC, and commencing with a 75nm trip from Port Klang to Pangkor. This year we will be racing this race, and the other two, which together will count towards our Sailonline Raja Muda Series (RMS), in J-109s.
Race #1961
INFO by brainaid.de
J-109 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RMS - SYC
Race starts: Nov 15th 04:00 Registration Open!

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Africa by Sea 2025 - Suez to Port Said


When Napoleon (briefly) occupied Egypt at the turn to the 19th C, he ordered his expedition’s Directeur des Ponts et Chaussées, Jacques-Marie Le Père, to evaluate the ancient, derelict, infilled course of a Ptolemaic canal connecting the Red Sea to the Nile via the Great Bitter Lake, versus a new canal to the Mediterranean directly. Neither were considered feasible – locks to climb a pauvre-surveyed 10m sea-level difference, or continuous dredging of the Nile, would both be equally financially prohibitive. Fifty years passed before the unlikeliness of Le Père’s survey finding was challenged and a French Compagnie Universelle du Canal Maritime de Suez obtained a 99-year concession from the Khedive of Egypt, Said Pasha, to construct and operate a canal from the Red Sea to the Mediterranean, much against the will of the Ottoman Sultan, Abdulmecid I (the Pasha’s nominal overlord), and the wishes of the (Irish) British prime minister, Lord Palmerston. The year was 1859, the very number of this race (planning, dear boy, planning!), which, despite the canal’s double-super-tanker gauge and lack of locks, is strictly prohibited to sailors IRL. But not SOLers! 85nm in Fareast 28Rs to complete your circumnavigation of Africa!
Race #1859
INFOby brainaid.de
Fareast 28R PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - ABS
RACE CLOSE: Tuesday,
November 18 at 2300 UTC.
Race starts: Nov 12th 17:00 Registration Open!
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Round Hong Kong TIMED Race 2025

This month’s TIMED race takes us to the hectic, bustling sea lanes of the South China Sea for a 118 nm race beginning and ending in Hong Kong rounding several of the 260 nearby islands along the way. The boat for this race is the South African built Cape 31. 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 #1964
INFOby brainaid.de
Cape 31 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ4 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
22 November at 23:00 UTC
Race starts: Nov 09th 12:00 Registration Open!
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Fernando de Noronha to Faroe 2025

The RWW Series concludes with a spectacular journey from Fernando de Noronha to the Faroe Islands, a legendary destination in the wild North Atlantic. Panning 4,100 nautical miles, this leg will be a true test of endurance, strategy, and sheer determination. Also the penultimate leg of the 2025 Ocean Championship, it’s your chance to prove your mettle against the sea, the wind, and yourself. We’ll be racing aboard the Ragamuffin 100, a vessel built for speed and challenge — demanding planning, precision and grit from every sailor on deck. Do you have what it takes to master the Northern Atlantic?.
PRIZE: SMPF
Race #1960
INFO by brainaid.de
Ragamuffin 100 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RWW - OCQ4 - OCCH - SUPSOL - SYC
RACE CLOSE: Monday,
November 24 at 2300 UTC.
Race starts: Nov 03rd 11:00 Registration Closed
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Sinbad by Balloon 2025 - Carnarvon to Dondra


From here, our home in Bharatavarṣa is now north west of us – said Sinbad to his fellow balloonists. Perhaps we can ride the wind first further north, and then catch the winds that every year bring the rain, perhaps not. It’s 2600nm and we could be aloft awhile, so, Master el-Quarters, victuals only, no sandbags, provisioning the giant hamper. It will be not a picnic!
Race #1886
INFOby brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - SBB
Race starts: Oct 15th 11:00 Registration Closed
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