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 » General Discussion » IMSYC / SOLstice Cup

Page: Previous 1 2

Posted by
76Trombones


Users avatar

Posts
362
Registered at
2009-08-03 18:04:56
2011-05-02 06:14:15 - Re: IMSYC / SOLstice Cup
Looks like a nice course Jakob!

Where can we find check_IMSYC66_parameters.m and IMSYC_weight_and_KG.m?

SOL's honour must be defended! ;-)
Posted by
jakob


Users avatar

Posts
364
Registered at
2007-09-04 10:05:30
2011-05-02 06:35:10 - Re: IMSYC / SOLstice Cup
You find them in Homework set 5 and 6.
...one of the guys behind the game...
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2011-05-02 18:30:23 - Re: IMSYC / SOLstice Cup
Tardis is in dry dock,
pending further developments.

--- Last Edited by 8mR Who at 2011-05-10 15:05:43 ---
None so blind
Posted by
Rod


Users avatar

Posts
392
Registered at
2010-06-24 22:30:48
2011-05-02 19:41:20 - Re: IMSYC / SOLstice Cup
I am interested in this 8-metre project, for a few different reasons.
Designing a boat is not a simple procedure, and is very time consuming. Merely changing a few of the parameters in the class rules is hardly the way to get a fast hull. The relationship of each dimension in the rules, to a "Fast" Polar diagram is not at all simple---yacht designers have been wrestling with this problem for centuries.
I have been doing essentially the same thing with regards to designing a radio-control Footy Class yacht, which is designed to a "box rule" (1ft long x 1ft deep x 6in wide), free rig, free displacement. I have been using the Vacanti CAD program, which produces both a set of plans and an extensive set of hydrostatic measurements, as well as graphs of drag curves. A designer needs to examine the effects of a wide variety of possible hull changes before even a rudimentary understanding of the characteristics which make for a fast hull can be obtained.
Only a very few SOLers may be willing to devote the needed time to this enterprise. I don't think I will be one of them, although I would certainly want to enter the race series itself
As an alternate way of developing this race, perhaps the polars for a number of existing 8M yachts could be obtained, and the SOL entrants pick which ever design suits their fancy. I am sure that no existing 8M is significantly better than any other in all winds and conditions.
I will watch the progress of this idea with great interest.
If it breaks, it's not strong enough--if it doesn't, it's too heavy.
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2011-05-12 18:17:44 - Re: IMSYC / SOLstice Cup
With all due respect to my esteemed colleagues who have already posted in this thread I wish to Thank 76T for making this endeavor accessible & doable.

As one who's only experience with sailing is that of a spectator sport that goes all the way back in the 60's when the 12 Metres still held sway in Newport, R.I., I can say that this exercise has enhanced my understanding of the Class rule concept.

While finding the optimum balance of the constituent components in the 8 Metre rule may be likened to seeking the Holy Grail, it does not diminish the enjoyment of pursing it none the less. In fact in may be a strength that such a goal will remain a challenge well into the future.

In all other cases here at SOL we deal with replicated polars so I feel it would be a loss to go that route here and eschew the unique opportunity to add the boat designer to our afterguard.

Without disrupting the current scheduling priorities administered so capably by RC these sort of races could be used as gap fillers as races wind down and the next event has not yet reached its opening phase.

If the courses for theses races could be constrained to a smaller footprint then the opportunity exists perhaps to apply higher definition weather grids for upwind / downwind leg racing.

I would like to see something of this nature go forward if only as a proof of concept sea trial in order to work out whatever particulars need to be addressed.

--- Last Edited by 8mR Who at 2011-05-12 20:07:30 ---
None so blind
Posted by
76Trombones


Users avatar

Posts
362
Registered at
2009-08-03 18:04:56
2011-07-10 16:50:43 - Re: IMSYC / SOLstice Cup
Now that IMSYC 2011 has concluded can we revive your (76T's) 8 Metre Rule challenge using the aforementioned polardesigner.org ?

I have improved my boat & will race against all comers even if that means it is just 76T in a match race.

Once the "Cup" has been Won it will have more value for future competitions.

8^)
I'm game - shall we decide on a format and venue?

I was thinking the other day that the best way to fit this sort of thing into SOL's calendar without disrupting the normal flow of things would be to run it as a very short-course (practice race scale - as Texel) timed race.

If we left the race open for the usual week, everyone could take a run with a few boats, and it would allow the super-keen to run a series using DC starts at agreed-upon times.

I'm partial to the round Isle of Wight course, but it doesn't fit this format. How about a 6 leg "Olympic triangle" (windward,reach,reach,windward,leeward,windward) set off the W coast of Barbados for predictible speed and direction in the trades. Mid-Sept?
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2011-07-10 19:04:40 - Re: IMSYC / SOLstice Cup
Although I am not well versed in actual sailing competitions I agree that a triangle twice around would reward a well designed polar sailed to its full potential as opposed to having landforms influencing the configuration of the race.

I would like to revisit the polar designer in order to fine tune my design prior to submitting it for certification.

A mid September race target is also good.
Final parameters due by August 31st would allow for the boats to be incorporated into the database for performance evaluation.

I am encouraged to see this special event come to fruition and will abide by any suggestions you feel will make this accessible to the greatest number of skippers here at SOL.
None so blind

Page: Previous 1 2

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Carib Rum Run 2026


Ahoy, ye landlubbers and seasoned salts! Welcome back to Sailonline’s legendary Carib Rum Run, perfectly timed to kick off on International Talk Like a Pirate Day, 19 September!

This year, we command the magnificent Falkun—the ultimate high-tech superyacht modeled after the iconic Maltese Falcon. This 1759nm slalom takes us through the Caribbean’s rum islands to plunder barrels from local distilleries and deliver them to the rum-parched sands of Cancun.

Join SYC before the finish to disguise yer boat with a pirate name for this race only. Hoist the sails, sharpen yer cutlasses, and plot your winning course!
Race #2060
INFO by brainaid.de
Falkun PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Sep 19th 05:00 Registration Open!
▶ Flash
GO TO RACE

Silverrudder 2026


Ahoy, SOLers! Welcome to the 2026 edition of the Silver Rudder – Challenge of the Sea! This epic 125nm single-handed race around Denmark’s island of Funen is back!

Shallow waters and shifting winds await in the world’s largest solo regatta. This year, we return to the popular First 27 solo. This superlight, water-ballasted planing machine features twin rudders and weighs a full tonne lighter than her older stepsisters. Will you master her power where precision counts most?!

It is imperative that you read AND understand these special Starting Conditions for SILVERRUDDER 2026:
Starting Conditions!!

Race #2059
INFO by brainaid.de
First 27 Solo PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - SUPBUD - RED
Race starts: Sep 18th 08:30 Registration Open!
▶ Flash
GO TO RACE

Isle of Mull TIMED Race 2026

Welcome to the west coast of Scotland for an 80 nm race around the Isle of Mull. Mull is home to castles, distilleries, and the Highland Games. The race begins just north of Oban in the shadow of Dunstaffnage Castle and after rounding the island finishes down the coast at Crinan. The Twister 28 with its classic long keel is the boat for this race.
This is a TIMEDrace so you may RE-REGISTER HEREto try again after finishing a run. You will have two weeks to test your skill and decision making after the race opens.
Race #2057
INFOby brainaid.de
PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SYC
RACE CLOSE: Saturday,
26 September at 23:00 UTC
Race starts: Sep 13th 12:00 Registration Open!
▶ Flash
GO TO RACE

Cross the Convergence 2026 - Cocos to Sagar Island


Kapil Muni, incarnation of Lord Vishnu, founder of the Samkhya school of philosophy, disturbed from his meditation, in his wrath reduced the 60,000 sons of Sagar to ashes, as they dug the earth to retrieve the sacrificial horse that Lord Indra, the king of the Gods, stole off Sagar, thus creating the Sagara (ocean). Aeons later, Bhagiratha, a descendant of Sagara, asked Ganga to cleanse the ashes of the 60,000 princes, and her resultant torrential fall from heaven created the great river and where it met the ocean, the princes’ souls were washed and raised to heaven and Gangasagar (Sagar Island) was formed. So, let us join the pilgrimages to Kapi Muni’s Temple (see above) and race 2400nm from Cocos Island deep in the Sagara thence, in rather rapid Rapido 60s.
Race #1987
INFOby brainaid.de
Rapido 60PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: CCZ - SYC
Race starts: Sep 11th 18:00 Registration Closed
▶ Flash
GO TO RACE

Shearwater - Rio de la Plata to Irish Sea 2026

Welcome to the fourth leg of our MIG series. This time we're racing the Sooty Shearwater on their migration from the breeding grounds in South America to the northern Atlantic. This is also part of our Ocean Championship, and as such the third race of OCQ3 2026. This race will be sailed in our Gunboat 90. Race #2055
INFO by brainaid.de
GunBoat 90 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ3 - OCCH - SYC - MIG
Race starts: Sep 02nd 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member CriticalHippo
  2. Sailonline Yacht Club Member KaSToR
  3. Sailonline Yacht Club Member WRmirekd
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member Panpyc
  6. Sailonline Yacht Club Member cdhinman
  7. Sailonline Yacht Club Member rthinman
  8. Sailonline Yacht Club Member BRENTGRAY
  9. Sailonline Yacht Club Member Sax747
  10. Sailonline Yacht Club Member vida

View full list

Series

Mobile Client

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

The mobile client