Sailonline.org - Online Sailing

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!

Tweets by @sailonline

Board » Technical Support » Gain or loss by using TWA

Posted by Chappo 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 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 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 --- 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 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 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 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 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 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 MyScreen.jpg (112.9 KB)

Page: Previous 1 2

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Victoria to Maui 2022
The Victoria to Maui International Yacht Race, first contested in 1968, is the pinnacle of Pacific Northwest ocean racing, running every two years. This year, Sailonline invites the SOL fleet to race the 2300nm course in Delphia 47s, from Victoria, British Columbia to Hawaii, finishing off Lahaina Maui.
PRIZE: SMPF
Race #1596
INFOby brainaid.de
Delphia 47 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ3-OCCH-SUPSOL-SYC
Race starts: Aug 09th 19:00 Registration Open!

▶ Flash

GO TO RACE

Brisbane to Hamilton Island Yacht Race 2022

Time once again to head for the warm waters inside The Great Barrier Reef, but this year not only online but together with our buddies at the Royal Queensland Yacht Squadron and their friends from across the world, in the iconic Brisbane to Hamo! Online we’re racing maxi’s to give you a chance to cover the 550 glorious blue water nautical miles in a time to best some of the fastest monohulls on the planet including Andoo Comanche, Black Jack and Hamilton Island Wild Oats . Fair winds, all!
Race #1606
INFOfrom brainaid.de
Super Maxi 100 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
RACE CLOSE: Sunday,
August 14 at 2300 UTC.
Race starts: Aug 05th 01:00 Registration Closed

▶ Flash

GO TO RACE

Sailonline’s 15th Birthday Balloon Race
Sailonline offers a huge variety of boats to sail in. One of the more unusual ones has got to be SOL's Balloon, which was polarized by past SOLmaster 76Trombones. Notably, the SOL Balloon will actually ‘sail’ in other directions other than straight downwind, although it will not 'sail' over land or beyond a 'beam reach'. Like in 2013 and 2018, we will be taking the Balloon across the Atlantic from St. John's and 'land' it in the sea off the Cliffs of Moher.
Race #1605
INFO by brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
None
Race starts: Aug 01st 19:00 Registration Open!

▶ Flash

GO TO RACE

Simonstown to St Helena 2022
This is a copy of a traditional South African December yacht race, but this time we will be racing in the middle of European summer. SOLers are invited to race 1712nm in our GB90s from Simonstown, RSA, to the exotic and remote island of St Helena - an island paradise with warm, friendly, hospitable islanders!
Race #1593
INFO by brainaid.de
GB90 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ3 - ARCH - SUPSOL - SYC
RACE CLOSE: Friday,
August 12 at 2300 UTC.
Race starts: Aug 01st 18:00 Registration Closed

▶ Flash

GO TO RACE

Go to race archive

SYC Ranking

View full list

Series

Mobile Client

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

The mobile client