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Magnetic variation updates for FS9 and FSX!

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So what exactly does the update do? Are runway numbers automatically changed? Approach headings in the runway database? I woudl love a more detailed explanation. I've alwasy found mag variation difficult.Colin WareSeattle

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I have been battling the infamous magdec.bgl drift for many months. Thanks for this! :(

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Will you include this in the ngx package ryan,for example in the installer give an option "do you want to update FSX magnetic update"Alex

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Will you include this in the ngx package ryan,for example in the installer give an option "do you want to update FSX magnetic update"Alex
Doubt it mate...Its not their creation so they wouldn'tBut its easy just to download and replace the old one... :) Why wait for the NGX to come with it when you can get it now?

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FS never stops to awe, Thanks Ryan, one more question, is it true that your simulated ADIRUs in the NGX have its own variation data ?

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Will you include this in the ngx package ryan,for example in the installer give an option "do you want to update FSX magnetic update"Alex
It's not our file so no, I'll see if we can mention it in the manual or something though.
FS never stops to awe, Thanks Ryan, one more question, is it true that your simulated ADIRUs in the NGX have its own variation data ?
The FMC does some pretty advanced calculations with respect to all of this, yes. You can fly the NGX over the poles, above 72N etc without issue.

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I'm not sure how I never knew about this, but someone created new magdec.bgl files for both FS9 and FSX that update both sims to the latest real world variation data. If you've ever wondered why the extended runway centerline on the ND doesn't line up with the waypoints of the approach - this is the reason. Both sims have old magnetic variation data while the positions of waypoints in the navdata are calculated using the current variation data.Download it here at the upper left and read the instructions - I'm using the 2010 files now for both sims and the stuff on the ND is way closer to how it should be now.http://hsors.pagespe...fr/navaids.htmlKudos to whoever did this!
Ryan,Now that you have discovered the site of Herve, maybe this thread is of more interest now to you and the team.http://forum.avsim.net/topic/320849-md-11-vor-course-on-nd/page__p__1931485__hl__budee__fromsearch__1#entry1931485As stated, for me not only MagVar, but also other items on this site, permitted me to change FSX in a way so as to make the ND of your MD11 behave more like the real thing.It also resolved the VOR TRACK mode.As the runway alignment is taken from the NavData base (WPNavApt) , it would be even better for the presentation if these data (RwyHdg) were correct.Why this doubt?Reference: NACO Approach chart KMEM ILS/LOC RWY09 gives an ILS course 091. The same is derived from the Navigraph NavData file of course, as it is an official figure.Looking at the KMEM Airport Diagram we see that the Magnetic Variation is indicating Januari 2010.Based on this, the Magnetic Runway heading (092.6) is shown at rwy09.As the ILS is not offset, I would expect an ILS frontcourse of 093.Also the radial GQE to BUDEE (shown as R137) is different from what an FMS and other programmes on the mentioned site calculate. (R141)Likewise, using an FMS Fix page to draw published radials over a missed-approach holding point,are offset.Well, knowing this I read the official charts differently at least.For me, several programmes on this site, including the warnings given, worked to improve the ND presentation as seen on the real plane.Highly recommended, including warnings!Other good thing is:The MD11 does not need an update..... -for this one- ..., cause external data (FSX and NavData) are involved.Regards,Harry

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Thanks for the link Ryan. I just installed the updated magvar database and have a question. I just recently (after the magvar update) did a couple of touch and go's at Aerosoft Mega Airport Stockholm-Arlanda in the 747X and found that when loading the aircraft on the active runway (in this case 01L) and without touching anything the aircraft was misaligned to the runway on the ND, but centered perfectly as far as I could see. The heading when loaded was 007 but the ILS heading is 005. When turning the heading knob to 005 the magenta heading bug aligned perfectly with the runway and extended (dotted) centerline on the ND. When checking the ILS heading in AFX the ILS was at 011 degrees. Has this anything to do with the magvar update? Could I just change the heading of the ILS in AFX to 005 or would this cause an offset? EDIT: I just checked the runway true heading in AFX and it is 11 degrees as well, so I presume, that without touching anything, I will have a correctly aligned ILS to the runway. But I noticed a strange thing in Navigraph, before updating the airport charts the heading of ILS01L was 006, but after the update 005. Can anyone explain this?Thanks in advance

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Many thanks to Hors for taking the time to develop this "fix", and for Tabs for bringing his work to our attention. I have just recently started to notice the runway centerline being offset from the majority of my approaches, which are based on up to date Navigraph data, but I thought this was a limitation of flightsim that could not be fixed, I'm happy to see this addressed finally!

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Thanks for the link Ryan. I just installed the updated magvar database and have a question. I just recently (after the magvar update) did a couple of touch and go's at Aerosoft Mega Airport Stockholm-Arlanda in the 747X and found that when loading the aircraft on the active runway (in this case 01L) and without touching anything the aircraft was misaligned to the runway on the ND, but centered perfectly as far as I could see. The heading when loaded was 007 but the ILS heading is 005. When turning the heading knob to 005 the magenta heading bug aligned perfectly with the runway and extended (dotted) centerline on the ND. When checking the ILS heading in AFX the ILS was at 011 degrees. Has this anything to do with the magvar update? Could I just change the heading of the ILS in AFX to 005 or would this cause an offset? EDIT: I just checked the runway true heading in AFX and it is 11 degrees as well, so I presume, that without touching anything, I will have a correctly aligned ILS to the runway. But I noticed a strange thing in Navigraph, before updating the airport charts the heading of ILS01L was 006, but after the update 005. Can anyone explain this?
I think everything here is normal and you shouldn't worry about it. In FSX (default scenery) the true 01L runway heading in Arlanda is 010.4° and 2010 magnetic variation is E4.8° so the FSX runway magnetic heading is 005.6°. This value is ok (Jepp charts and Navigraph data indicate 005° and a MV of 5°E). ILS heading in AFX is a TRUE value (as runway heading), so do not change it to 005° - 10.4° is correct. Now there could be a problem with the scenery you use I do not have. Also do not expect to have a perfectly centered ILS when using the FS start positions. Usually the heading is correct, but there is often a small lateral offset from runway center line. Enough to have a 1-2 dots localizer deviation, considering the localizer antenna is very close. Finally it is likely that the latest Navigraph release has updated the ILS course by 1°. Jepp charts for ESSA have been updated in Feb-April 2011 and foot-note changes are: Var, Rwy bearings.Hope it will helpHervé

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It's not our file so no, I'll see if we can mention it in the manual or something though.The FMC does some pretty advanced calculations with respect to all of this, yes. You can fly the NGX over the poles, above 72N etc without issue.
The Australian Government currently uses an A319 or A310 (can't remember which) to fly scientists, etc to a base in Antarctica from Tasmania (Australia's southern-most state) on a regular basis. It would be interesting to try this flight in the NGX! I have the scenery for this base. Nothing flash, but it's a challenging landing when the sky is cloudy and the snow is also white, meaning you can't get a visual reference of the horizon.

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IS there anything bad that can come from installing this mag variation patch?

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IS there anything bad that can come from installing this mag variation patch?
No, just backup the original. And if anything gets messed up, just revert. I can tell you it works great!

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I think everything here is normal and you shouldn't worry about it. In FSX (default scenery) the true 01L runway heading in Arlanda is 010.4° and 2010 magnetic variation is E4.8° so the FSX runway magnetic heading is 005.6°. This value is ok (Jepp charts and Navigraph data indicate 005° and a MV of 5°E). ILS heading in AFX is a TRUE value (as runway heading), so do not change it to 005° - 10.4° is correct. Now there could be a problem with the scenery you use I do not have. Also do not expect to have a perfectly centered ILS when using the FS start positions. Usually the heading is correct, but there is often a small lateral offset from runway center line. Enough to have a 1-2 dots localizer deviation, considering the localizer antenna is very close. Finally it is likely that the latest Navigraph release has updated the ILS course by 1°. Jepp charts for ESSA have been updated in Feb-April 2011 and foot-note changes are: Var, Rwy bearings.Hope it will helpHervé
Thank you Hervé! That answered all my questions nicely.

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IS there anything bad that can come from installing this mag variation patch?
It breaks ILS course IIRC.Best regards,Robin.

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It breaks ILS course IIRC.Best regards,Robin.
Don't think it does. As Hervé stated earlier, ILS courses are in True heading, so the Magvar update might things like ND-track a little misaligned (probably not though if the airport is done correctly).If you look at my earlier question most of my "problems" were either because I confused Tru with Mag or because the airplane wasn't perfectly aligned with the centerline on startup. Since then I have performed plenty of touch and go's but most importantly 2 successful autolands at ESSA.

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It breaks ILS course IIRC.Best regards,Robin.
No, it does not break the ILS course.FSX is outdated regarding MagVar, that is if you use current approach charts and latest AIRAC files.In FS. the runways are aligned to true north, the local variation gives the correct runway heading on any ND.So what Tabs means is that the graphical runway alignment (and extended centerline) will be better aligned if using the Magdec.bgl he found on the site of Herve Sors. Unless offset, all ILS'es are fixed to the runway centerline. (be it real or FS).If realtime magnetic variation is applied to official charts (mostly once every 5 years), part of this operation is to change the ILS course as well if needed. (Do not see this at the NOAA charts however, read my thread above). Runway re-numbering is another possible item involved. Now, if your intention is to fly any airplane A to B by FMS and get you captured by the ILS, then you'r done, be happy with the resulting landing.Is there more we should know? Might be.Ever wondered why VOR needles on the ND did not indicate direct to a station?Ever wondered why VOR track mode on the MD11 was in between the MAP dotted line and the VOR CDI presentation?Same reason as the runway alignment being solved by a recent MagVar update.Still interested?VOR's (except a few oriented True North) have there reference to magnetic north.FS.'s VOR's are referenced to the default FS. magnetic variation.(declination if you want).Replacing the Magdec.bgl in FS. does not correct the VOR operation.What you could do, if you like:Read what is avail on the site of Herve. EasyNavs is a possible option to tweak your FSX installation so as to get it as real as it gets. Worked for me, MD11 freak.(real and FS that is)On to the little workhorse NGX, FSX will be the same default, or can be adapted to more real data by using info provided on the site of Herve Sors.Regards,Harry

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Awesome... another thing I've always been looking for, but sometimes you just don't use the right keywords... ;-)

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Still interested?VOR's (except a few oriented True North) have there reference to magnetic north.FS.'s VOR's are referenced to the default FS. magnetic variation.(declination if you want).Replacing the Magdec.bgl in FS. does not correct the VOR operation.What you could do, if you like:Read what is avail on the site of Herve. EasyNavs is a possible option to tweak your FSX installation so as to get it as real as it gets. Worked for me, MD11 freak.(real and FS that is)Harry
Harry,How do you correct the vors with easynavs ?I downloaded the program but then got confused and figured I'd better ask here before I screw up stuff.ThanksVic

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Harry,How do you correct the vors with easynavs ?I downloaded the program but then got confused and figured I'd better ask here before I screw up stuff.ThanksVic
Well, not the answer to your question, but maybe an answer to your problem:Why don't you just download the whole 1105 update-pack (on the same website)? That will correct every VOR in FSX that needs correcting ;-)

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