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 thread

Page: First Previous 8 9 10 11 12 13 14 Next Last

Posted by
Sebensa


Users avatar

Posts
70
Registered at
2010-10-06 14:50:36
2016-12-29 17:06:30 - Re: qtVlm thread
OK, let me frame it a bit differently, can one adjust qtVlm vmg calc's ? Dankie :-)
Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2016-12-29 18:49:44 - Re: qtVlm thread
You are speaking about VMG or VBVMG?

VMG calculations in qtVlm are rounded to the nearest degree, if I remember well.
Posted by
kroppyer


Users avatar

Posts
346
Registered at
2010-02-05 15:25:55
2016-12-29 23:49:11 - Re: qtVlm thread
We are not familiar with VBVMG, can you explain or link us to an explanation?

Sebensa is simply referring to the angle a that gives the maximal/minimal value for boatspeed(a)*cos(a). If it's rounded to the nearest degree, QtVLM can be off by enough-to-loose-some-distance in some cases. If you want integer VMG angles, I would suggest you calculate the VMG=boatspeed(a)*cos(a) for the two nearest integer values of the optimal angle, and choose the one with the best VMG. This will be at least as good as rounding to the nearest integer value.
Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2017-01-02 11:08:01 - Re: qtVlm thread
Happy new year to all

In short, VBVMG consists in doing ortho when possible, and polar best-VMG-Wind when it is not.

We have the same formula for VMG (hopefully). The values are precalculated with a precision of 0.1 kts for TWS and 0.1° for TWD.
Posted by
Kipper1258


Users avatar

Posts
194
Registered at
2015-06-18 22:08:49
2017-01-05 05:17:23 - Enhancement Request - auto delete of route waypoints when passed
I have an enhancement request. Would it be possible to automatically delete route waypoints that are "passed"? For a route that is connected to the boat, a waypoint is considered "passed" when the angle between boat COG and the bearing to the next waypoint in the route exceeds 90 degrees. That is, you are now going away from the waypoint, and no longer towards it.

The reason I ask is that quite often, I find an older routing , after deleting passed waypoints and re-optimising, is faster than a newly created one. If you have six or seven routes alive, it takes quite a while to update them all with each new Wx.

Thanks
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2017-01-07 14:17:01 - Re: qtVlm thread
Viva Philippe.

Good afternoon.

A small issue with Grib files merging.

I’ve loaded in Slot 1 the Grib file “TEcnLLTTOoSYmtRzKDl0e75I4HAjqDApvb6.grb” and in Slot 2 the Grib file “TEcnLLTTOoSYmtRzKDl0e75I4HAjqqDApvx.grb”.

After I’ve merged the two files in the file “GRIB MARINE, 07.01.2017.grb”.

If I load separately both files in Slots 1 and 2 I get it correct.

But if I load the merged file, only the lower part of the (merged) Grib is shown.

What is the problem?

Thank you.

João / psail



--- Last Edited by JB at 2017-01-07 14:19:03 ---
Sail Fair.
Attachments
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2017-01-07 14:20:16 - Re: qtVlm thread
For some reason the second Grib didn't went . Goes now.

João / psail
Sail Fair.
Attachments
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2017-01-30 15:30:21 - Re: qtVlm thread
Viva all,

Good afternoon.

Last qT version (5.4.7) when we close it, it crashes (with or without GPS on).
It is an issue that already happened. After it was solved and, came back again on the last release.

Any suggestion to avoid this, pls.

Thank you
João/psail
Sail Fair.
Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2017-01-31 11:21:28 - Re: qtVlm thread
No crash here, and I don't have any reports like that from other users so far. Can you send me your qtVlm files (*.dat, *.ini) please?
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2017-01-31 12:00:15 - Re: qtVlm thread
Viva Philippe,

Thank you for your help.
Pls, see e-mail.

Big Hug
João/psail
Sail Fair.

Page: First Previous 8 9 10 11 12 13 14 Next Last

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Kamchatsky to Tromsoe 2024

Just before the light failed entirely in Antarctica, Skip Novak managed to get his Pelagic 77 out of the ice and north up the Pacific to Kamchatsky. The sun is shining (24/7) and not a penguin to be seen, and Skip believes the Norh East Passage is ice-free (sufficiently) to attempt it, so all aboard for a c 4250nm voyage from east to west across the top of Siberia, Russia and Norway to Tromsoe!
Race #1779
INFOby brainaid.de
Pelagic 77 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: HLAT - SYC
Race starts: Jul 18th 19:00 Registration Open!
▶ Flash
GO TO RACE

Cowes to St Malo TIMED Race 2024

Organized by the Royal Ocean Racing Club since 1929, the Cowes to St Malo Race is a true RORC Classic. Starting from the Royal Yacht Squadron Line, Cowes, IOW, a magnificent spectacle can be watched from The Parade, Cowes. The Cowes to St Malo Race is part of the RORC Season’s Points Championship, the world’s largest offshore racing series. Dating back to 1906, the Cowes to St Malo Race precedes all of the world’s famous races including the Fastnet Race. 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 #1828
INFOby brainaid.de
TP-52 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
27 July at 23:00 UTC
Race starts: Jul 14th 12:00 Registration Open!

▶ Flash
GO TO RACE

Lake Ontario 300 Challenge 2024

Lake Ontario Offshore Racing (LOOR) welcomes Sailonline to a second race of their annual series, this time as hosts of the virtual LO300. As the name implies, the LO300 is a 300nm offshore race across the length and breadth of Lake Ontario, from and back to Port Credit YC. Once again, as is our wont on Lake Ontario, a fleet of Beneteau First 36.7s is being made available to virtual racers. There is an overall prize for the SOLer who best bosses Lake Ontario over the two races hosted on SOL, this 300 and the Susan Hood raced back in May; so let the competition be fierce!
Race #1805
INFOby brainaid.de
First 36.7 PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: LOOR - SYC
Race starts: Jul 13th 15:10 Registration Open!

▶ Flash
GO TO RACE

SSANZ Triple Series 2024 - Race 1


Welcome once again to our online buddied Short-handed Sailing Association of New Zealand brilliant long-standing SSANZ Triple Series for two-handed yachts on the waters of the Hauraki Gulf, sponsored this year by Lewmar Marine. Commencing with a c 46nm quick dash out to Motuora Island via The Haystack and home, we will as always compete in virtual Young88s, against the real-life fleet of the members of the ever-Young 88 Association!!
Race #1823
INFO by brainaid.de
Young 88 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SSANZ - SYC
Race starts: Jul 12th 21:15 Registration Closed
▶ Flash
GO TO RACE

Tall Ships Races 2024 - Tallinn to Turku


Welcome to the second of three virtual Tall Ships Races on the Baltic Sea which are concurrently being organized in-real-life Sail Training International . This second race is from Tallinn, Estonia to Turku, Finland; circa 150nm in Sailonline’s stately Full Rigger.
NOTE: Starts and Finishes in tall ships racing are always offshore to avoid conflict with shipping and shipping lanes.
Race #1812
INFO by brainaid.de
Full Rigger PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TS - SYC
RACE CLOSE: Friday,
July 19 at 2300 UTC.
Race starts: Jul 11th 14:00 Registration Closed
▶ Flash
GO TO RACE

Southampton to Punta del Este 2024

Sailonline is delighted to offer our sailors a 'reversed' Atlantic ocean race. As the RTW championship Atlantic part takes a detour to the Bahamas, we will offer you a reversed course as we will not do the 'usual' leg this year either. It is the July edition of this year's Ocean Championship. Our boat is the OD_65v3.
PRIZE: SMPF
Race# 1820
INFO from brainaid.de
OD65 PARTICULARS
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ3 - OCCH - SUPSOL - SYC
Race starts: Jul 01st 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member WRmirekd
  2. Sailonline Yacht Club Member FreyjaUSA
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member Vida_Maldita
  5. Sailonline Yacht Club Member rafa
  6. Sailonline Yacht Club Member TarassBoulba
  7. Sailonline Yacht Club Member Flamingo
  8. Sailonline Yacht Club Member CollegeFund
  9. Sailonline Yacht Club Member Sax747
  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