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 » qTVlm wish list #3.

Page: 1 2 3 Next

After the new qT 5.3.7 version my wish list (now, the #3) didn’t change at all.

What I would like to have:

1 - Possibility to pause and resume the “routing” routine calculation.

2 - Elimination of the annoying extra imposed tack/gybe waypoints on the “routing” calculation before boat effectively changes direction.

3 - Resulting from waypoints over decimation, during the “Simplifying” process the calculated ETA normally is bigger than the initial calculated one. In that situation the ”Simplifying” process should be immediately automatically stopped.

4 - To avoid/reduce, namely, the jigsaw calculated “routes”, possibility to define and impose a minimum time delay between consecutive boat maneuvers, with a time parameter for tacks and another one for gybes.

5 - Possibility to superimpose the initial calculated Isochrones and the final calculated ”route” (after applying the Simplifying and Optimizing processes).

6 - Possibility to make a free hand selection of the calculated waypoints (now, only available the rectangular shape selection area).

7 - Boat “Polar analysis” was better in the previous versions where you could see all the Polar curves using with the “Display all” option. That option disappeared (?!).

8 - VMGUp and VMGDown points shown in the Polar Curves.
Sail Fair.
Quick answer:

This minor release was mainly meant to fix a small issue with VLM mode.

I don't quite understand your point 2) . Is it related to 4) ?

Concerning point 4): This aspect has been greatly improved already in 5.3.6. Did you check it? There is a chapter on that in the documentation.

Point 3) The simplifying process may increase a little ETA if you choose "Maximum simplification". Choose "Optimum simplification" if you don't want this to occur.

Point 7) Yes it has been removed, on purpose because unreadable most of the time.

Point 8) Values are shown on the right panel. Do you mean to show them also graphically?

Philippe.






--- Dernière modification par maitai le 2016-07-01 16:48:07 ---
Viva Philippe.

Thank you for your reply.

2) and 4) are different problems.

2) qt always tries to add an extra tack or gybe right before effectively change the boat route direction. This is irritant because you have to spend more time hand trimming that extra generated waypoint. This problem is particularly agravated when the routed path goes downwind.

But more. With the last release I started to get with res wind Gribs "breaks" in long curved routed paths after making the Simplifying process. Instead of having a continuous curve, qT tries to break allong the curve with a manouveur in direction to the curve center. I give you a clue: smooth curves, is the drill.

4) Especially downwind, comes the second described problem, the jigsaw path, when qT generates (as an example) #10 gybes in 10 minutes, i.e., going for a boat manouveur in every minimum Time Step (1 minute) that qT allows. If you are using the mentioned minimum TS the number of extra tack waypoints to be trimmed after is huge. With the Loss of Performance you get in every manouveur you make, it's not logical that qT finds out that the quickest path is the one using a larger quantity of directions changes (tacks).
On one side of the "equation" we need to have hi res wind Grib files and a shorter TS. On the other, qT over stretches the results generating more than abundant waypoints. Hence my suggestion to apply different limitating parameters in 4).

3) My dear Philippe, I never use the "Maximum" option. Never. Even so... ETA goes up which is a nuisance.

7) Well, with the actual by default Polar window size that unreadable problem shouldn't occur, no? Pls have a try on that.

8) Yes, correct. Also graphically.

Thank you Philippe.
Sail Fair.
For the 4):

Even if you don't specify an actual polar penalty for tack and gybes, you can specify a number of cranks duration for tacking. For instance if you put 10 there, and your crank is 1mn, qtVlm wont be able to tack or gybes for 10 minutes after a tack or a gybe.

--- Dernière modification par maitai le 2016-07-02 08:53:58 ---
Ok, I'm going to try it with 5 cranks/minutes for a FIRST 47.7.
Anyhow, the qT limitation is equal for tacks and gybes, when it should be different.
Sail Fair.
Sorry Philippe but... no go. The problema remains, qT tries to put allways that anoying extra waypoint for a gybe.

Something here tell's me that the minimum TS/crank is (?) in conflict with the time for delay on boat maneuvers.
Sail Fair.
Probably I don't understand what is your extra waypoint for a gybe. Can you join a screenshot?
Viva Philippe.

Pls see attached PDF file.

Thank you.
Sail Fair.
Attachments
Hmm that is gonna take a bit of time, and I am leaving for vacation in a couple of days for almost 3 weeks ;)

Can you send me via email an export of your configuration including polar please?

Viva Philippe.

I can send you everything you need..mais, quelle est ton email, Philippe?

(mon email: pertisjm@net.sapo.pt )
Sail Fair.

Page: 1 2 3 Next

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 will open soon
▶ 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 Open!

▶ Flash
GO TO RACE

Gulf of St Lawrence 2025


The Gulf of St. Lawrence, with one of the largest and deepest estuaries in the world, will be the site of a completely new race in SOL. Our Melges 40 will take us 950 nm from Bathurst in Baie des Chaleurs around the islands of Anticosti, Pelee and Prince Edward admiring beautiful landscapes along the way. Fair winds.
Race #1910
INFO from brainaid.de
Melges 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ2 - ARCH - SUPSOL – SYC
RACE CLOSE: Friday,
May 2 at 2300 UTC.
Race starts: Apr 21st 17:00 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 Kipper1258
  9. Sailonline Yacht Club Member rafa
  10. Sailonline Yacht Club Member bonknhoot

View full list

Series

Mobile Client

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

The mobile client