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

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! ;-)
You find them in Homework set 5 and 6.
...one of the guys behind the game...
Tardis is in dry dock,
pending further developments.

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

Koshiki PYOC Sprint 2025


For the first time since 2017 we return to the islands and shima’s offshore Nagasaki, Japan. This time our crafts of choice are X-35’s. Just 23nm in a straight line but choose your course wisely.
Race 1954
INFO by brainaid.de
X-35 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SPRQ3 - SPRCH - SUPSOL – SYC
Race starts: Sep 20th 15:00 Registration will open soon
▶ Flash
GO TO RACE

Silverrudder 2025


Ahoy, SOLers! Get ready for the epic Silver Rudder – Challenge of the Sea! This 125nm single-handed race around Denmark’s island of Funen is back—shallow waters, narrow straits, and shifting winds await. This year, we trade up to our single-handed X-99s—can you master their power where precision counts most? It’s the world’s largest solo regatta, and your virtual helm is calling! Chart your course, trust your instincts, and race for glory in this ultimate test of seamanship!

It is imperative that you read AND understand these special Starting Conditions for SILVERRUDDER 2025:
Starting Conditions!!

Race #1948
INFO by brainaid.de
X-99 Single-handed PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Sep 19th 09:00 Registration Open!

▶ Flash
GO TO RACE

Rome to Tripoli 2025


The next race in the ARCH series will take us almost straight from Rome to Tripoli. But don't expect this 550nm race to be an easy one. The Mediterranean always offers some surprises. So let's prepare your Lagoon 55 with due care and... Fair Winds.
Race #1943
INFO from brainaid.de
Lagoon 55 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ3 - ARCH - SUPSOL – SYC
Race starts: Sep 15th 17:00 Registration Open!
▶ Flash
GO TO RACE

Carib Rum Run 2025

Welcome to the Caribbean and Sailonline’s legendary Carib Rum Run! This year we trade tall ships for pure speed as we race our sleek Santa Cruz 70s on a 1759nm slalom through the rum islands. Yer mission: plunder barrels from the region’s finest distilleries and deliver ‘em to the rum-thirsty sands of Cancun, Mexico. Finish on or before International Talk Like a Pirate Day, 19 September, to etch yer name in legend! Join SYC before race end and ye scallywags can disguise yer boat with a pirate name for this race only! Hoist the sails, sharpen yer cutlasses—the rum run awaits!
Race #1944
INFO by brainaid.de
Santa Cruz 70 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Sep 15th 00:00 Registration Open!
▶ Flash
GO TO RACE

Roslagen TIMED Sea Race

Welcome to quite possibly the most challenging TIMED race of the year. This month finds us in Sweden with lots of islands and narrow passages when we sail our Seacart 30 trimaran over the 86nm from Lidingö outside Stockholm to the beautiful coastal village of Öregrund. Consider yourself a winner if you complete the course nonstop! 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 #1945
INFO by brainaid.de
Seacart 30 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
20 September at 23:00 UTC
Race starts: Sep 07th 12:00 Registration Open!
▶ Flash
GO TO RACE

Great Nicobar to Marion Island 2025

The Adventure Continues – Leg #6 of the RWW Series.
We’re setting sail on the next stage of the RWW Series: a 4,400-nautical-mile passage from Great Nicobar to Marion Island. This demanding leg will test endurance, strategy, and seamanship at the highest level. As part of the 2025 Ocean Championship, this marks the ninth legendary challenge in the series — and one of the most exhilarating yet. The race will be contested aboard the Archer 78’ ketch, a vessel built to push sailors to their limits across the vast Indian Ocean.
PRIZE: SMPF
Race #1942
INFO by brainaid.de
Archer 78 PARTICULARS    
WX Updates:
0430 / 1030 / 1630 / 2230    
Ranking: OCQ3 - RWW - OCCH - SUPSOL - SYC
RACE CLOSE: Thursday,
September 25 at 2300 UTC.
Race starts: Sep 01st 11:00 Registration Closed
▶ 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 BRENTGRAY
  8. Sailonline Yacht Club Member Sax747
  9. Sailonline Yacht Club Member Panpyc
  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