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
347
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
251
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:

Roma per Tutti 2026


Sailonline are honoured and delighted to have been asked to partner an online first Roma per Tutti yacht race with organizing yacht club, Circolo Nautico Riva di Traiano . In real life, this will be the 33rd edition of this 540nm offshore race from Rome’s Riva di Traiano to the Aeolian Islands and back. Online, the race will not only be our first partnership with CN Riva di Traiano, but also the second race of our Magical Mediterranean series. A number of Mini 6.50s have been entered for the 33rd edition of the Roma per Tutti; so our own vintage Mini is also our virtual yacht of choice for this one.
Race #2019
INFOby brainaid.de
Mini 6.50 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: MED - SUPBUD - SYC
Race starts: Apr 11th 10:00 Registration Open!
▶ Flash
GO TO RACE

Rommel by Balloon 2026 - Through the Sahara


Generalfeldmarschall Johannes Erwin Eugen Rommel may have been that chivalrous, gallant tank commander of legend, led astray by the Prussian military traditions of loyalty and chain of command, but one thing he wasn’t, was mad. So, let’s do it anyway – not stick to the coast and the battle for logistical superiority – but depart the oases of Siwa south west into the desert for Agadez and its uranium. And let’s go by balloon, it’s only 2500km (1250nm)!
Race #1973
INFOby brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: BOL - SYC
Race starts: Apr 07th 13:00 Registration Open!
▶ Flash
GO TO RACE

Falklands to Tasmania 2026

Welcome to yet another all-new route. This next race is part of our Ocean Championship as well as the ROW series. Falklands to Tasmania, is like last year's island to island. It’s one of the longer ones 6400nm, more than half way around the world (and the Antarctica). It starts the 2026 OCQ2, and will be sailed in our Steinlager 2, contrary to prior notice.
Race #2021
INFO by brainaid.de
Steinlager 2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - ROW - OCCH - SYC
Race starts: Apr 06th 11:00 Registration Open!
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member KaSToR
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member rafa
  4. Sailonline Yacht Club Member rumskib
  5. Sailonline Yacht Club Member CriticalHippo
  6. Sailonline Yacht Club Member CollegeFund
  7. Sailonline Yacht Club Member Panpyc
  8. Sailonline Yacht Club Member Sax747
  9. Sailonline Yacht Club Member sassy63
  10. Sailonline Yacht Club Member vida

View full list

Series

Mobile Client

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

The mobile client