Jump to content

Sign in to follow this  
very-short

VASFMC 2.1 Fuel Bug ?

Recommended Posts

Hi Guys , I have just installed the latest version of VASFMC { 2.1 } Gauge Version into FS9 but have found when calculating the fuel it seems to freeze , I have done a google Search for this bug buts its not well documented .... the sad part being that the VASFMC Web Site has closed ... Can anyone Shead any light on this ? is it only related to the Gauge Version ?? or does the same bug appear in the stand alone one as well ? I was really looking forward to getting to know this little FMC .Very Sad to see the support forums etc are off line .CheersAndrew W { Very-short }

Share this post


Link to post
Share on other sites

Hi Andrew,I also downloaded VasFMC 2.1 recently (just before their site closed) and I also eventually hit the fuel issue.I believe that there are actually two issues:1. The fuel calculation is sometimes VERY long and you may think it's frozen!2. If the flight plan is not well defined (without any waypoints or incorrect waypoints), I suspect fuel calculation to fail.Note that you don't have to use fuel calculation, the FMC will work correctly without.After having used it for a couple of weeks, I must say that I'm quite happy with it.Cheers,CaptainBerty.

Share this post


Link to post
Share on other sites

Hi Captain , Thanks very much for your reply , interesting theories on the bug ... its a great feature and want to stick with it I know my Fp's are pretty good so im not picking a waypoint problem as I use up to date Nav Data from Navgraph I will try your idea about taking a long time as I narrowed the problem down to a aircraft { at this stage my IFDG A320 } at first I was thinking of corrupt config file in Vasfmc on the base data about the A320 but not sure yet it is a great shame that VASFMC has closed down its a wonderful Addon for an airbus given the complexity of FBW . Thanks again for your reply I was beginning to think I was the only one with the problem ...hahaha not much floating around on the net about it .CheersAndrew

Share this post


Link to post
Share on other sites

Andrew,You're welcome.I also regret that vasfmc is closing. It's really a cool add-on and free!!!I heard that the source code may become public; I will try to get it.Back to the fuel issue: I also recall that the calculation is maybe failing when you recreate a flight-plan over an existing one, without first erasing the previous one (using the CLR + FROM/TO buttons in the INIT page). Just to give you some additional things to check :-)Tell me if you can pin-point the exact cause.CaptainBerty.

Share this post


Link to post
Share on other sites

Hi Captain , interesting theory about the flight plan ... one I will look into ... I have the IFDG A318 and A320 my problems seem to occur using the A320 so I opened up both the A318 and A320 AC Config files just to see if anything jumped out at me that was different in terms of basic systems ... the only thing I came up with was that the A318 had the following entry ....[General]atc_type=Airbusatc_model=A318editable=1The A320 had following ....[General]atc_type=Airbusatc_model=A320editable=0so as you can see the difference is the "Editable" so I change my A320 to the same as the A318 entry ... fired up FS and the A320 and went flying with no problems at all with the fuel input data ...... now am unsure if the change has made any difference as further testing will be needed .I would be interested to see what AC people fly with VASFMC and see if they have the same problem ?CheersAndrew

Share this post


Link to post
Share on other sites

well back again with an update .... I have just installed an update to FSUIPC { went from 3.7 to 3.99 Registered } and hello my fuel problem is back I need to run a few more flights to see if It will freeze again but so far two out of two flight have frozen and both have crashed the sim ....hmmmmmm

Share this post


Link to post
Share on other sites

Hi Andrew,For your information, I personnaly downgraded to using vasfmc v2.0a9 (gauge version).This is the latest stable version based on the opensource set of vasfmc source files (which I also downloaded).This version is not much different to v2.10, except that it doesn't include fuel calculation!And the user interface is slightly different, but really not much.The main reason for me to downgrade, is that v2.0a9 uses another type of .cfg file for aircraft profiles, containing enough parameters for me to create working aircraft profiles for various types of aircrafts; whereas v2.10 seems to hardcode much parameters (max IAS and stall speeds for example), making it difficult to create a working profile for an aircraft very different to an A320 or B737...Cheers,CaptainBerty.

Share this post


Link to post
Share on other sites

Is the fuel calculation the only thing that's different between 2.0a9 and 2.10? What about the vertical guidance/tod calculations?

Share this post


Link to post
Share on other sites

Andrew,Here is what I found out:- Yes, tod is present and called out in v2.0a9.- Speed and altitude restrictions appear in the flight plan and the MCDU,but the speeds restriction are not applied automatically (v2.10 changes the speed bug automatically for you).- For take off, you don't have the choice between flex temp and derated, v2.0a9 only provides derated (=N1 hold).Berty.

Share this post


Link to post
Share on other sites

Hi Guys , ok an update to this problem and I think I have found a work around ... ok I believe the reason VASFMC crashes when calculating the fuel load is now due to the plan data .... I have found that if your flight plan has a nav/waypoint very close to your departure/arrival airport it cant calculate the fuel needed as its too close ...example ... my flight is from say Auckland New Zealand to Wellington New zealand so the flight plan looks like this from Vroute....

 

NZAA|-37.0080560000|174.7916670000|0||ADEP||cfl=320;fnr=ANZ516;croute=NZAANZWN306;adep=NZAA;ades=NZWN

AA|-37.0046390000|174.8136390000|0|DCT||..................Problem line #1

LIMES|-37.5716670000|174.6386950000|0|H384||

KARRL|-37.9766670000|174.5122220000|0|H384||

NP|-39.0072500000|174.1839440000|0|H384||

AKAVI|-39.9996670000|174.2638030000|0|H384||

SWUTH|-40.7697220000|174.3275000000|0|H384||

TR|-41.1858440000|174.3623780000|0|H384||

BAXOV|-41.2411830000|174.5276830000|0|H235||

WN|-41.3372220000|174.8169720000|0|H235||............ Problem line #2

NZWN|-41.3272220000|174.8052780000|0||ADES|

 

The problem begins with the two lines I have highlighted ..... the waypoints seem to be too close to calculate the fuel required Thus causing VASFMC to Crash so a simple fix is to delete these two lines from the FP then re-save the FP import it into VASFMC . I have been doing this for a while now and it seems to work fine the fuel load etc is calculated and VASFMC runs fine pretty much 100% of the time .... I hope this helps anyone who uses VASFMC .... it was only by chance I stumbled across this fix but it seems to work I was able to narrow the problem down to the FP causing the problem because it was only sometimes VASFMC would crash so the only variable was the FP .

 

Enjoy

Cheers

Andrew W

Share this post


Link to post
Share on other sites

Thank you very much, Andrew, finally I can see hope for my PA A380 flights. Just a question: how close is too close? 3NM? 5NM? 10 NM?

Share this post


Link to post
Share on other sites

Hi Luis ,

Sorry for the late reply I have been away , as to your question Im unsure as to how close is to close but Im picking anything under 5NM will probably be the cause of the problem ... I have a question for you .... so has this fixed the problem for you ? I would love to know if anyone else has found this fix to help ?

 

cheers

Andrew W

Share this post


Link to post
Share on other sites

Well, where my A380 is based, the next waypoint is barely 2 NM after takeoff. This time I didn't include this waypoint, but another one 20 NM away. I have no CTDs at all. I'll try again with something closer. Thanks a lot.

 

Offtopic: I've just reached my 500th post! :Party: Looks like I've flown a lot... 6.5 years for achieving this milestone? ^_^

Share this post


Link to post
Share on other sites

Well, where my A380 is based, the next waypoint is barely 2 NM after takeoff. This time I didn't include this waypoint, but another one 20 NM away. I have no CTDs at all. I'll try again with something closer. Thanks a lot.

 

Offtopic: I've just reached my 500th post! :Party: Looks like I've flown a lot... 6.5 years for achieving this milestone? ^_^

No Worries , it use to bug me setting up my flight with VASFMC and then bang it would crash at the fuel Calc Stage , please do let me know how close you get it down before Vasfmc Crashes  congrads on your 500th post !

Share this post


Link to post
Share on other sites

Hi Guys , ok an update to this problem and I think I have found a work around ... ok I believe the reason VASFMC crashes when calculating the fuel load is now due to the plan data .... I have found that if your flight plan has a nav/waypoint very close to your departure/arrival airport it cant calculate the fuel needed as its too close ...example ... my flight is from say Auckland New Zealand to Wellington New zealand so the flight plan looks like this from Vroute....

 

NZAA|-37.0080560000|174.7916670000|0||ADEP||cfl=320;fnr=ANZ516;croute=NZAANZWN306;adep=NZAA;ades=NZWN

AA|-37.0046390000|174.8136390000|0|DCT||..................Problem line #1

LIMES|-37.5716670000|174.6386950000|0|H384||

KARRL|-37.9766670000|174.5122220000|0|H384||

NP|-39.0072500000|174.1839440000|0|H384||

AKAVI|-39.9996670000|174.2638030000|0|H384||

SWUTH|-40.7697220000|174.3275000000|0|H384||

TR|-41.1858440000|174.3623780000|0|H384||

BAXOV|-41.2411830000|174.5276830000|0|H235||

WN|-41.3372220000|174.8169720000|0|H235||............ Problem line #2

NZWN|-41.3272220000|174.8052780000|0||ADES|

 

The problem begins with the two lines I have highlighted ..... the waypoints seem to be too close to calculate the fuel required Thus causing VASFMC to Crash so a simple fix is to delete these two lines from the FP then re-save the FP import it into VASFMC . I have been doing this for a while now and it seems to work fine the fuel load etc is calculated and VASFMC runs fine pretty much 100% of the time .... I hope this helps anyone who uses VASFMC .... it was only by chance I stumbled across this fix but it seems to work I was able to narrow the problem down to the FP causing the problem because it was only sometimes VASFMC would crash so the only variable was the FP .

 

Enjoy

Cheers

Andrew W

 

Greetings Andrew,

I have been a fan of the vasFMC for some time. I also have experienced the dreaded FUEL PLANNING crash (or hang) in FS9 more than I care to think. Although your discovery may be correct (i.e.: a nearby waypoint in the FP) it may not be the only case it seems. As I've run into this issue, I have tried my share of options to work around it. One was to enter the FROM/TO AP, FLT NBR, CRZ/FL and COST INDEX in the first page of the INIT. Then, with trepidation, I proceed to the Page 2 of INIT, click the RSK beside the ZFW, then FUEL PLANNING page (without entering the FP), and I get the same hang/crash. To be clear, I have tried going through entering the entire FP complete with DEPARTURE AND ARRIVAL information and then to the FUEL PLANNING and also get the crash. So, if there's no FP (other than FROM/TO) it causes the same problem; sometimes. No WPs, NAVAIDS, SIDs or STARS and works sometimes but not others. I've also done it that way and it works. Any thoughts?  I am at work, so when I get home this evening, I am going to try the theory you mention.  Also very coincidental as I never have flown much in NZ, but I just tried a flight 3 days ago NZAA-NZQN with the first WP/NAVAID of AA. However, I was successful in entering the FP into vasFMC. 2 days later I tried NZAA to NZWN with a first WP of LIMES and no luck (had to switch to the ANZ B733). Go figure.

 

Any additional input would be grand as I want to use this great addon with the PA Airbus but it's hard to abide the unpredictable behavior.

 

Thanks for your legwork to narrow this down.

Best,

Jeffrey S. Bryner

Share this post


Link to post
Share on other sites

Greetings Andrew,

I have been a fan of the vasFMC for some time. I also have experienced the dreaded FUEL PLANNING crash (or hang) in FS9 more than I care to think. Although your discovery may be correct (i.e.: a nearby waypoint in the FP) it may not be the only case it seems. As I've run into this issue, I have tried my share of options to work around it. One was to enter the FROM/TO AP, FLT NBR, CRZ/FL and COST INDEX in the first page of the INIT. Then, with trepidation, I proceed to the Page 2 of INIT, click the RSK beside the ZFW, then FUEL PLANNING page (without entering the FP), and I get the same hang/crash. To be clear, I have tried going through entering the entire FP complete with DEPARTURE AND ARRIVAL information and then to the FUEL PLANNING and also get the crash. So, if there's no FP (other than FROM/TO) it causes the same problem; sometimes. No WPs, NAVAIDS, SIDs or STARS and works sometimes but not others. I've also done it that way and it works. Any thoughts?  I am at work, so when I get home this evening, I am going to try the theory you mention.  Also very coincidental as I never have flown much in NZ, but I just tried a flight 3 days ago NZAA-NZQN with the first WP/NAVAID of AA. However, I was successful in entering the FP into vasFMC. 2 days later I tried NZAA to NZWN with a first WP of LIMES and no luck (had to switch to the ANZ B733). Go figure.

 

Any additional input would be grand as I want to use this great addon with the PA Airbus but it's hard to abide the unpredictable behavior.

 

Thanks for your legwork to narrow this down.

Best,

Jeffrey S. Bryner

Hi Jeffrey ,

                Thanks for your reply ,you have made some very interesting observations ,Unfortunatly I have had to re-install my operating system and am working my way to getting everything back up and running so I cant test your theories at the moment .My work around was just based on a bit of trial and error with a proccess of elimination,so far after using my method I never had any hangs or Crashes so it lead me to believe the issue relates to waypoints in the FP .but hey I could be completely wrong ...haha Im no puter programmer but like you I love VASFMC and only fly my IFDG A320 .Please let me know how you get on given VAS is no longer being produced or supported its up to us to maybe figure it out ...

 

Cheers

andrew W

Share this post


Link to post
Share on other sites

Hi Jeffrey ,

                Thanks for your reply ,you have made some very interesting observations ,Unfortunatly I have had to re-install my operating system and am working my way to getting everything back up and running so I cant test your theories at the moment .My work around was just based on a bit of trial and error with a proccess of elimination,so far after using my method I never had any hangs or Crashes so it lead me to believe the issue relates to waypoints in the FP .but hey I could be completely wrong ...haha Im no puter programmer but like you I love VASFMC and only fly my IFDG A320 .Please let me know how you get on given VAS is no longer being produced or supported its up to us to maybe figure it out ...

 

Cheers

andrew W

 

Hi to all,I had the same problem: I can hopefully confirm your theory: the problem is inside the flightplan,if you try to make a simple flightplan (departure and arrival airports with runways only + waypoints) without SID and STAR , for beginning, and then you put your block fuel in the VASFMC, all is OK, then you can add without any problem your preferred SID & STAR and what else you want and all works! certainly the fuel remain the same, but this is for me the only way to go around this problem!

Cheers

Gian

Share this post


Link to post
Share on other sites

Hi guys,

 

to prevent the freezing of vasFMC in the event of Fuel Planning:

 

blank FMC:

 

1.) fill out the required fields on INIT 1 page (dep/arr, F.nr,CI,FL) and press Align IRS

2.) go to INIT 2 page, click LSK1R to receive ZFW data and after this click LSK3R to receive your Fuel Planning amount, click LSK3R again to confirm

3.) enter your flightplan and so on...

 

So the solution is only to have the departure and arrival airport in your flightplan, no waypoints and no sid/star.

 

Works perfect for me without freezing.

 

Bye,

Kontio

Share this post


Link to post
Share on other sites

Have a solution here, worked for 5 consecutive flights, might help:

1. Fill the INIT page

2. Insert the route

3. Now in the fuel planning page, fill the TAXI fuel with any number (below the limits of course) and after that input 0 into that field.

4. Now click the Fuel Planning button

5. Fly :)

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...