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

Posted by
JB


Users avatar

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


Users avatar

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


Users avatar

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


Users avatar

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


Users avatar

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


Users avatar

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


Users avatar

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


Users avatar

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
Posted by
maitai


Users avatar

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


Users avatar

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:

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:
SPQ3 - SPRCH - SUPSOL - SYC
Race starts: Sep 20th 15:00 Registration Open!
▶ 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 CLOSE: Wednesday,
September 24 at 2300 UTC.
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