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:

The Tall Ships Races 2020 - Race 1

Welcome to the first of three virtual races representing this year's European Tall Ships Races - a race of 220nm from Lisbon, Portugal, giving Cabo de Sao Vicente and Ponta de Sagres plenty of searoom, to Cadiz, Spain
NOTE:Starts and Finishes in tall ships racing are always offshore to avoid conflict with shipping and shipping lanes.
Race #1352
INFO by brainaid.de
Clipper 240 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
RANKING: TSE - SYC
ALT. CLIENT: Classic
Race starts: Jul 05th 12:00 Registration Open!
New HTML5 Client GO TO RACE

SSANZ Triple Series 2020 - Lewmar 60 PIC

Welcome to Auckland, New Zealand and, for the 9th successive year, Sailonline is happy to provide the virtual version of the brilliant three-race SSANZ two-handed series, raced around the waters of the Hauraki Gulf off New Zealand’s North Island. Our direct competitors in this 2020 Lewmar 60 PIC course are the real racers of the Young 88 Association.
Race #1370
INFO from brainaid.de
Young 88 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SSANZ - SYC
ALT. CLIENT Classic
Race starts: Jul 03rd 21:15 Registration Open!
New HTML5 Client GO TO RACE

Pacific Cup 2020


Pacific Cup Yacht Club (PCYC) invites all sailors and SOLer's to participate in the virtual edition of this biennial race from San Francisco Bay, USA, to Kaneohe Bay on Oahu's east coast in the Hawaiian Islands 2070nm across the Pacific Ocean.
Race #1371
INFO by brainaid.de
Santa Cruz 52 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
RANKING: SYC
ALT. CLIENT: Classic
Race starts: Jul 02nd 19:00 Registration Open!
New HTML5 Client GO TO RACE

Auckland to Uruguay - 2020 RTW - Leg 3
The third leg of Sailonline's Round the World Race 2020 sees the fleet navigating its way from Orakei, Auckland, New Zealand, across the Pacific and up the South Atlantic to Punta del Este, Uruguay
For your transit from ocean-to-ocean you may leave Tierra del Fuego to port or to starboard, as you please.
PRIZE: SMPF
Race #1362
INFO from brainaid.de
Orange 125ft Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCCH-OCQ3-SUPSOL-SYC-RTW20
ALT. CLIENT:Classic
Race starts: Jul 01st 20:00 Registration Open!
New HTML5 Client GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member WRmirekd
  2. Sailonline Yacht Club Member bonknhoot
  3. Sailonline Yacht Club Member Dingo
  4. Sailonline Yacht Club Member calmxy
  5. Sailonline Yacht Club Member Kipper1258
  6. Sailonline Yacht Club Member knockando60
  7. Sailonline Yacht Club Member rafa
  8. Sailonline Yacht Club Member Starship
  9. Sailonline Yacht Club Member Jawz
  10. Sailonline Yacht Club Member GREATSKUA

View full list

Series

Mobile Client

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

The mobile client