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 » Jubilant Fastnet Campaign Qualifying Races - POLAR needed

Page: Previous 1 2

Posted by
NZL_Scotsman


Users avatar

Posts
251
Registered at
2008-10-04 07:59:40
2013-04-24 07:07:25 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
I would think you are faster under small spinnaker or gulling than with a genny in heavy conditions. Therefore the first one.


--- Last Edited by NZL Scotsman at 2013-04-24 07:08:20 ---
Posted by
javakeda


Users avatar

Posts
73
Registered at
2013-03-01 03:18:22
2013-04-25 15:45:57 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
Initial thoughts:
[Forgive me it I state the obvious.]

1) Having different polars for different sail configurations [and/or weather conditions] is fairly common for IRL routing. So the choice between 'a" and 'b' is not absolute.

2) Shape is more important than scale. It is a lot easier to scale a shape than vice versa.

3) In SOL we get used to having detailed polar values for every TWA degree and TWS nm.
IRL, it may be more constructive to think in terms of Points of Sail.

I would test values for being on a:
-- beat
-- close reach
-- beam reach [TWA = 90, NOT AWA = 90]
-- broad reach
-- run [tacking downwind]
-- DDW [wing and wing]
with particular attention to finding "maxVMG" points for the
-- upwind sweet-spot
-- downwind sweet-spot.
[Helmsman needs to make the call here. Mark the time when the helmsman is happy. Use post-sail log analysis to determine values. Feedback corrections can apply to the polar, the helmsman, or both ... but it is normally easier to correct the polar, and make the helmsman aware of the change.]

4) For empirical polars, it is a whole lot easier to think in terms of a sparse polar that is wind-line based ... as opposed to one that has values for almost any wind angle and wind speed. I would try for a sparse polar first [like the one for the J30 attached] and let software fill in the details later.
Certainly a sparse polar is easier to revise.

Again, these are just initial thoughts based on my experience in validating the polar for a Beneteau First 47.7 [cruising rig].



--- Last Edited by javakeda at 2013-04-25 15:51:08 ---

--- Last Edited by javakeda at 2013-04-26 15:27:51 ---

--- Last Edited by javakeda at 2013-04-26 15:28:35 ---
Attachments
Posted by
ALL_4_Aaron


Users avatar

Posts
5
Registered at
2012-09-22 11:10:08
2013-04-26 15:04:06 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
quote: Feedback corrections can apply to the polar, the helmsman, or both ... but it is normally easier to correct the polar, and make the helmsman aware of the change.]

LOL
Posted by
ybw_mjm


Users avatar

Posts
20
Registered at
2009-11-12 21:48:35
2013-04-26 17:15:10 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
After having sailed the Moody s38 for a number of years, the _b polar is looking like a good match in terms of shape and speed.
My only comment is that since we are a little heavier we might need a little more wind to get us going.
Virtual sailors might do better than us in real life if the winds are light.
We will record our speed/wind data in real life and see then what improvements can be made.
Posted by
RainbowChaser


Users avatar

Posts
2656
Registered at
2009-06-14 09:44:50
2013-04-26 17:49:39 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
mjm - OKies Jubilant_b it shall be.

In reality you will have the benefit of tide? or current? so maybe the fact that SOLers will grab the wind swifter will be offset a little?

:-)
Posted by
ybw_mjm


Users avatar

Posts
20
Registered at
2009-11-12 21:48:35
2013-04-27 00:36:03 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
Tide.. Good thinking..
Although I think in the first race (4th May) we will be against a weak tide IRL for the first hour or so...then crossing the English Channel, the tide will be across our course.. so it should all even out in the end.
Posted by
ybw_mjm


Users avatar

Posts
20
Registered at
2009-11-12 21:48:35
2013-04-27 00:37:41 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
With the race to The Rock - IRL the tide will be with us for six hours and then against us for six hours. It will be like this all along the south coast so should even out with the virtual yachts.
Posted by
76Trombones


Users avatar

Posts
362
Registered at
2009-08-03 18:04:56
2013-04-27 00:43:46 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
SOL takes a pretty big hit vs irl on nearshore winds, so it's all probably a bit moot.

Looking forward to seeing you guys out on the water!
Posted by
ybw_mjm


Users avatar

Posts
20
Registered at
2009-11-12 21:48:35
2013-04-27 01:51:01 - Re: Jubilant Fastnet Campaign Qualifying Races - POLAR needed
So are we!

It's going to be interesting...

Page: Previous 1 2

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Elephant Island to Marquesas 2025

Prepare to test your limits as we launch into the third leg of the RWW Series and the fifth leg of the 2025 Ocean Championship Series—an epic voyage from Elephant Island to the Marquesas in the heart of French Polynesia. This 4,700-nautical-mile challenge is a true test of endurance, strategy, and raw sailing adrenaline. Aboard the high-performance Volvo 70v4, competitors will face fierce headwinds as they round the legendary Cape Horn and make the thrilling transition from the Atlantic to the Pacific. Do you have what it takes to conquer the Pacific? Join us, and put your skills to the ultimate test.
PRIZE: SMPF
Race #1909
INFO by brainaid.de
VO70_v4 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - RWW - OCCH - SUPSOL - SYC
Race starts: May 05th 11:00 Registration Open!
▶ Flash
GO TO RACE

Bosphorus Strait Sprint 2025


Welcome to the Bosphorus for a testing sprint twice through the narrow channel separating the Black Sea from the Mediterranean - the traditional boundary between Europe and Asia.
Race 1914
INFO by brainaid.de
Dehler 30 OD PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SPRQ2 - SPRCH - SUPSOL – SYC
Race starts: May 04th 09:00 Registration Open!
▶ Flash
GO TO RACE

Bay to Bay 2025 - Leg 2 - Great Sandy Stait

After a thrilling opener, the 2025 edition of the Bay to Bay Yacht Race continues with Leg 2, bringing even more adrenaline and tactical excitement to the waters of the Great Sandy Marine Park. In collaboration with the Hervey Bay Sailing Club, our SOLers will once again take the helm of their lightning-fast 18-foot skiffs, this time tackling a 24-nautical-mile course through shifting breezes and tight competition.

With fresh legs, sharper tactics, and everything to race for, it’s anyone’s game! See you on the start line for the grand finale!
Race #1906
INFO from brainaid.de
18ft Skiff PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: B2B - SYC
Race starts: May 03rd 21:30 Registration Open!
▶ Flash
GO TO RACE

Bay to Bay 2025 - Leg 1 - Great Sandy Strait

Prepare for an electrifying start to the 2025 Bay to Bay Yacht Race! In partnership with the Hervey Bay Sailing Club, this first leg will see our SOLers take on a fast-paced, 16-nautical-mile sprint through the stunning waters of the Great Sandy Marine Park, weaving past the breathtaking landscapes of the Great Sandy National Park. Racing in high-powered 18-foot skiffs, the fleet will battle shifting winds, tricky tactics, and fierce competition—all in pursuit of victory! With the thrill of the race and an unforgettable sailing experience ahead, we can’t wait to see you on the start line!
Race #1905
INFO from brainaid.de
18ft Skiff PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: B2B - SYC
Race starts: May 03rd 01:00 Registration Open!
▶ Flash
GO TO RACE

Regata dell’Accademia Navale 2025

Welcome to Sailonline’s first partnership with the City of Livorno, in cooperation with the local yacht clubs and the Italian Navy, to offer you the online opportunity to race the Regata dell’Accademia Navale. 630nm in length, starting and finishing in Livorno, the race takes you the length and breadth of the Tyrrhenian Sea via Porto Cervo and Capri. Online, you will be sailing a Class 40, which should keep you well in with the top of the real-life fleet which we will be tracking on screen!
Race #1902
INFO by brainaid.de
Class 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
RACE CLOSE: Friday,
May 9 at 2300 UTC.
Race starts: Apr 27th 09:00 Registration Closed

▶ Flash
GO TO RACE

Transat à Deux 2025

Above you see a single-handed sailor semi-foiling his Beneteau Figaro III to the horizon. It is in fact Ireland’s Sailor of the Year and the overall winner of last year’s Solitaire du Figaro, Tom Dolan. Somehow, we got our hands on a polar for the Class, and rather than trying to surreptitiously track Tom and his mates in the 2025 edition of the Solitaire, sailing rather-short, single-handed legs across the Celtic Sea and Biscay, we thought we’d see how our virtual craft would fare on the Class’s double-handed 3900nm Trans-Atlantic, from somewhere in Brittanny to somewhere in the Caribbean via somewhere in the Canaries. Allez, mes braves!
Race #1901
INFOby brainaid.de
Figaro III foil PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Apr 20th 11:00 Registration Closed
▶ Flash
GO TO RACE

Sinbad by Balloon 2025 - Toamasina to Baia de l'Oiseau


You may recall that when last we visited Madagascar in the company of Sinbad, the Sultan commanded our intrepid inspirator to seek out fabled islands where in Summer the sun barely set. We did and we returned but the Sultan wasn’t happy with Sinbad’s report, so here we go again, now by SOL Balloon instead of sailing vessel. Expect to be in the air for at least 2100nm and depending on how the wind brings us, anything between two weeks and two months before we shall descend at the Sultan’s given coordinates!
Race #1884
INFOby brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - SBB
Race starts: Apr 09th 11:00 Registration Closed
▶ Flash
GO TO RACE

Valparaiso to San Francisco 2025

Get ready for an exhilarating new challenge as we set sail on the fourth leg of the 2025 Ocean Championship Series! Following in the 19th century footsteps of Isabel Allende's heroine, Eliza Sommers, 'Daughter of Fortune', this all-new route takes us across the vast eastern Pacific, from Valparaíso, Chile, to San Francisco, California - a 3500nm journey of endurance, strategy, and pure sailing adrenaline. This leg will be raced aboard the powerful Rapido 60, pushing sailors to their limits as they navigate the open ocean. Do you have what it takes to conquer the Pacific? Join us and put your skills to the ultimate test!
PRIZE: SMPF
Race #1900
INFO by brainaid.de
Rapido 60 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - OCCH - SUPSOL - SYC
Race starts: Apr 07th 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member Patrick70119
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member KaSToR
  5. Sailonline Yacht Club Member FreyjaUSA
  6. Sailonline Yacht Club Member vida
  7. Sailonline Yacht Club Member rumskib
  8. Sailonline Yacht Club Member bonknhoot
  9. Sailonline Yacht Club Member Kipper1258
  10. Sailonline Yacht Club Member rafa

View full list

Series

Mobile Client

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

The mobile client