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Profile for Chappo



Name Chappo
Email Address peter@mindmechanics.com.au
AvatarUsers avatar
Posts53
  • 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!)
  • 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??
  • 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
  • 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.
  • 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.
  • Re: Gain or loss by using TWA
    Board » Technical Support
    8MR, I see the diagram embedded in the post and as an attachment too?
  • 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.
  • 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.
  • 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.
  • 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.

Races

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Current Races:

Cape Town to Auckland 2024


Welcome to the second leg of this Round The World series 2024. It's also the April edition of this year's ocean race championship. The course is the same as the one sailed in 2023, but this year we sail the iconic Swan 65, as suggested in the concluding RTW race last year.
Prepare yourselves for an epic 30-day journey, navigating through the unpredictable waters of the South Seas. It's essential to take care of provisioning to ensure a smooth and enjoyable race experience. With the longer duration, we anticipate plenty of opportunities for camaraderie, competition, and unforgettable memories.
PRIZE: SMPF
Race# 1789
INFO from brainaid.de
Swan 65 PARTICULARS
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - RTW - OCCH - SUPSOL - SYC
Race starts: Apr 01st 11:00 Registration Open!
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Gladstone Ports Corporation Brisbane to Gladstone Yacht Race 2024

Welcome everyone to the 76th anniversary of the GPC Brisbane to Gladstone Yacht Race , Australia's other classic ocean race. Once again, Sailonline is delighted to offer you the opportunity of virtually racing its TP52 over this challenging 308nm course.
Race #1787
INFO by brainaid.de
TP52 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
RANKING: SYC
Race starts: Mar 29th 01:00 Registration Open!
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Vuelta Isla de Chiloé 2024
Designed by SOLer Hotu Matua in 2010 but barely raced since, this is a 263nm race battling the extreme sea, wind and current conditions around the fabulous landscapes of Chile’s Chiloé archipelago. Previously sailed in our somewhat unsuitable Seacart 30, we’ll venture forth in our slightly more modern, water-ballasted Sun Fast 3300 this time. Keep the hatch closed!
Race #1795
INFO by brainaid.de
Sun Fast 3300 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Mar 28th 05:00 Registration Open!

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Tyrrhenian Tour 2024

For only the second time in SOL's history we will race 800 nautical miles around the small islands of the Tyrrhenian Sea. Fourteen years ago, as many as 383 yachts took part in the competition, will we match the number of participants this time? So, jump into your Judel Vrolijk 62 and lets get ready to race.
Race #1793
INFO by brainaid.de
JV 62 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ1 - ARCH - SUPSOL - SYC
RACE CLOSE: Wednesday,
April 3 at 2300 UTC.
Race starts: Mar 25th 17:00 Registration Open!
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San Juan Islands TIMED Race 2024

Welcome to the beautiful Pacific Northwest and the San Juan Islands. The Salish Sea is home to five different types of whales including Orcas, making this archipelago one of the best places in the world to see whales in the wild. The Cape 31 is a one-design yacht originally created for racing in South Africa, which has rapidly expanded with fleets around the world. This is a TIMED race, so you may RE-REGISTER HERE to try again, after finishing a run. You will have 13 days and 11 hours to show your skill and decision making after the race opens.
Race #1792
INFO by brainaid.de
Cape 31 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ1 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
30 March at 23:00 UTC
Race starts: Mar 17th 12:00 Registration Open!
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Casey Station to Neumayer Station 2024

It’s late summer now in Antarctica, the sun will still not set, but the Emperor chicks are hatched. Let’s yacht on from Australia’s Casey Station, destination Germany’s Neumayer Station! Our route takes us past Molodezhnaya Stancija, Russia’s self-styled capital of Antarctica, as well as Mirney (RUS), Davis (AUS), Mawson (AUS), Syowa (JAP) and Maitri (IND) down the full length of the continent’s east coast. It’s not much more than 2600nm, so let’s take Brazil’s Amyr Klink’s more stately and very comfortable 29m LOA Paratii 2 for this second leg of our six-leg high latitude adventure!
Race #1765
INFOby brainaid.de
Paratii 2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: HILAT - SYC
RACE CLOSE: Tuesday,
April 2 at 2300 UTC.
Race starts: Mar 14th 19:00 Registration Closed
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