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 » qTVlm wish list #3.

Page: 1 2 3 Next

Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-07-01 14:23:21 - qTVlm wish list #3.
	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.
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-07-01 16:47:43 - Re: qTVlm wish list #3.
	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 ---
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-07-02 08:41:42 - Re: qTVlm wish list #3.
	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.
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-07-02 08:53:28 - Re: qTVlm wish list #3.
	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 ---
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-07-02 13:37:10 - Re: qTVlm wish list #3.
	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.
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-07-02 14:33:21 - Re: qTVlm wish list #3.
	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.
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-07-02 15:04:58 - Re: qTVlm wish list #3.
	Probably I don't understand what is your extra waypoint for a gybe. Can you join a screenshot?
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-07-03 15:22:42 - Re: qTVlm wish list #3.
	Viva Philippe. Pls see attached PDF file. Thank you. Sail Fair. Attachments qT_Problems.pdf (630.2 KB)
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-07-03 18:12:52 - Re: qTVlm wish list #3.
	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?
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-07-03 19:59:45 - Re: qTVlm wish list #3.
	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:

Manilla to Calbayog 2024

After six years, we welcome you to the race created by sassy63 for the second time. He takes us to the Philippines to race around islands on a 380 nm course. We sail the Italia 14.98 and in Calbayog we'll enjoy our well-deserved Palatan dish and drink it with San Miguel.
Race #1803
INFO from brainaid.de
Italia 14.98 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ2 - ARCH - SUPSOL - SYC
Race starts: Apr 22nd 17:00 Registration Open!

▶ Flash

GO TO RACE

Jakob's Birthday BBQ Race 2024

Sailonline had two founders and Jakob, the more senior of the two, has his birthday in April which we always like to celebrate with a race through the Stockholm Archipelago from Revengegrundet Lighthouse to his mooring at Baggensfjärden. Traditionally also, like other celebrations this time of year, this feast has been “moveable”, so on this occasion we will be racing on a Wednesday in one of our latest high-performance 40-footers, the Carkeek 40. Please join us then for this always tricky 30nm race. Grattis på födelsedagen Jakob!
Race #1794
INFO by brainaid.de
Carkeek 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Apr 20th 14:00 Registration Open!

▶ Flash

GO TO RACE

Melbourne to Osaka Prelude 2024

Welcome once again to what these days is Sailonline’s almost annual virtual Melbourne to Osaka Yacht Race. In real life, this double-handed 5500 nm race between these two sister cities, one deep in the southern hemisphere, the other high in the northern hemisphere, is run every four to five years, and is planned to be held again in 2025, so this race is a Prelude in partnership with the Melbourne Osaka Cup 2025 organising committee collaborating with the Ocean Racing Club of Victoria (ORCV), and the Sandringham (SYC) and Osaka Hokko (OHYC) yacht clubs. On this occasion, we’ll be racing the well-known First 40, a popular size of boat for a long-distance double-handed race. With the doldrums unavoidably lying across the track, you can expect to be at virtual sea for at least a month!
Race #1669
INFO by brainaid.de
First 40 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Apr 20th 00:00 Registration Open!

▶ Flash

GO TO RACE

St Nazaire Chasse TIMED Race 2024

Welcome to a "chasse" (hunt) from St. Nazaire to La Baule on the west coast of France! This race was designed by SOLer FR_flouflou in 2010. The KER 40 was introduced to SOL in 2016 by SOLer psail, and the Sol-KER was a welcome addition to SOL’s fleet of 40- footers, as it was to the IRL Ker fleet of eponymous - like KERonimo, KukuKERchu and Ice BreaKER. This is a TIMEDrace, so you may RE-REGISTER HERE to try again, after finishing a run. You will have 13 days and 11 hours to show your skill and decision making after the race opens.
Race #1797
INFOby brainaid.de
Ker 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ2 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
27 April at 23:00 UTC
Race starts: Apr 14th 12:00 Registration Open!

▶ Flash

GO TO RACE

The Beagle in the Straits of Magellan 2024

Both before and after visiting the Falkland Islands, the Beagle extensively explored the south eastern coast of South America, hither and thither, from north of the Rio Plate to the tip of Tierra del Fuego, but it was not till the end of June 1834 that the ship made it into the Pacific Ocean, transiting via the Straits of Magellan. Online in 2024, the choice is yours - passage the strait or round the cape; 400nm or more in your Class B Tall Ship.
Race #1753
INFOby brainaid.de
Tall Ship Class B PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SVF - SYC
RACE CLOSE: Sunday,
April 21 at 2300 UTC.
Race starts: Apr 09th 13:00 Registration Closed

▶ Flash

GO TO RACE

Cape Town to Auckland 2024

Welcome to the second leg of this Round The World series 2024. It's also the April edition of this year's ocean race championship. The course is the same as the one sailed in 2023, but this year we sail the iconic Swan 65, as suggested in the concluding RTW race last year.
Prepare yourselves for an epic 30-day journey, navigating through the unpredictable waters of the South Seas. It's essential to take care of provisioning to ensure a smooth and enjoyable race experience. With the longer duration, we anticipate plenty of opportunities for camaraderie, competition, and unforgettable memories.
PRIZE: SMPF
Race# 1789
INFO from brainaid.de
Swan 65 PARTICULARS
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - RTW - OCCH - SUPSOL - SYC
Race starts: Apr 01st 11:00 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