Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Board » Technical Support » Gain or loss by using TWA

Page: Previous 1 2

Posted by
Chappo


Users avatar

Posts
53
Registered at
2009-04-17 12:00:35
2011-06-02 04:25:14 - Re: Gain or loss by using TWA
*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.
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2011-06-02 05:10:45 - Re: Gain or loss by using TWA
Nevermind I just found the BBCode link
None so blind
Posted by
AGage


Users avatar

Posts
411
Registered at
2008-12-27 10:31:57
2011-06-02 08:16:54 - Re: Gain or loss by using TWA
Chappo said @ 2011-06-02 01:46:19:
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.
=======================
I have not completed it satisfactorily for publishing yet - actually barely usable within a race - although a few of its tools are complete and usable - kinda got side tracked when i started helping the SOL development team ;-)
It requires you to login to a sol race, so gets the polar data from there - also you can set it to automatically use your current wind from SOL, so its just a button push.
Actually this 'module' that computes vmc is one of the few that is completed and you can specify either 'WP' for the next course waypoint, a CC - target direction, or a lat/lon (in decimal degrees) target location. WP or lat/lon are the most useful I think, especially if you are so attentive as to adjust course frequently after re-computing.

While I am working on a few things for the sol client, they are just ideas atm and I don't intend to implement them with any haste, so hopefully I can have time to get this toolkit out the door... soon!
All of the base code that grabs the race and boat data from SOL was written well prior to me joining the dev team, so I don't see a 'conflict' when I release this, as I spent hours in a web debugger and pulling apart data packets to discover how to do it - so it doesn't rely on any 'internal sol knowledge' to work.
Actually there is nothing anyone with a little knowledge and time cannot discover about how SOL works - all its data is just XML, using standard HTTP GET and POST messages.

Tthis module also computes max BS twa to, which I have found use for on occasion in the long IMOCA legs... often it is obvious from the polar diagram within the SOL client, especially now it can be enlarged, but was also just one of those things that "its 6 lines of code, and why not include it?" ;-)

Perhaps rather than trying to get a whole set of tools out at once I should release a subset like this vmg/vmc calculator...
If I had access to a website to deploy to I would like to write some tools as a flash app that everyone can use within a browser. But a few visual tools rely on OS functionality so they wouldn't be possible (like the butterfly overlay)

All I can say regarding availability is "soon" and "keep an eye out on my sol tools blog :-)

_________________
Edited to reduce line so that column did not overlap :-D

--- Last Edited by RainbowChaser at 2011-06-03 18:31:09 ---
I help develop the client interface for the best online ocean racing sim there is... __/)/)_/)__
Posted by
Chappo


Users avatar

Posts
53
Registered at
2009-04-17 12:00:35
2011-06-02 11:00:39 - Re: Gain or loss by using TWA
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.
Posted by
Schakel


Users avatar

Posts
183
Registered at
2008-12-19 09:19:00
2011-06-02 14:02:12 - Re: Gain or loss by using TWA
Chappo said @ 2011-06-02 11:00:39:
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.
Some say he doesn't eat or sleep and only rolls his own. All we know is, he's called the Gage.

Cheers,
Philip
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2011-06-02 16:26:51 - Re: Gain or loss by using TWA
None so blind
Posted by
AGage


Users avatar

Posts
411
Registered at
2008-12-27 10:31:57
2011-06-03 07:18:41 - Re: Gain or loss by using TWA
LOL Shackel - now I just need to get my lap times as consistent as his ;-)
I help develop the client interface for the best online ocean racing sim there is... __/)/)_/)__
Posted by
WhyNot


Users avatar

Posts
51
Registered at
2011-02-03 18:39:54
2011-06-15 16:49:56 - Re: Gain or loss by using TWA
Schakel: Well chosen!

This is my desktop at the moment.

Tom

--------
edited to shorten the url to a link to reduce column widening!

--- Last Edited by RainbowChaser at 2011-06-16 16:33:43 ---
Attachments

Page: Previous 1 2

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Red Eye - Myth of Malham 2025

In 1947, Hugh McLean & Sons of Gourock, Scotland built a radical racing yacht for John Illingworth, soon-to-be Commodore of the RORC, to a design by Laurent Giles. With a masthead rig, giving her ‘free’ sail area per the rules of the time, and short overhangs reducing pitching, Myth of Malham went on to win The Fastnet that year and again in 1949, and to compete in numerous Admiral's Cups. In 1958, in honour of the yacht, the Myth of Malham race was conceived - a mini-Fastnet to the first lighthouse on a rock west of Cowes, Eddystone, rather than the second, to be held in non-Fastnet years. IRL this year it has been raced already, but this stops us not from “Red Eye” racing its online 230nm in Fareast 31Rs, leaving how to deal with the Isle of Wight open to your own discretion.
Race #1847
INFOby brainaid.de
Fareast 31R PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - RED
Race starts: Aug 25th 12:00 Registration Open!
▶ Flash
GO TO RACE

Africa by Sea 2025 - Maputo to Mogadishu


The fifth leg of our exploration of Africa By Sea takes us north along the length of the Continent’s succulent sub-tropical and tropical Indian Ocean coast. Much fought over by traders and colonists both well-before and after a Portuguese expedition under the command of Vasco da Gama first sailed there from Europe back in the 16th century, it is yet to be properly explored as a yachting destination. With plenty of islands off- and inshore, small and very large, there is much to interrupt your 1900nm voyage and visit in your Swan 65, from Maputo to Mogadishu! Race #1858
INFOby brainaid.de
Swan 65 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - ABS
Race starts: Aug 20th 17:00 Registration Open!
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member vida
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member KaSToR
  6. Sailonline Yacht Club Member Kipper1258
  7. Sailonline Yacht Club Member Sax747
  8. Sailonline Yacht Club Member BRENTGRAY
  9. Sailonline Yacht Club Member FreyjaUSA
  10. Sailonline Yacht Club Member CollegeFund

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client