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Navigraph Integration http://www.ocs-support.co.uk/forums/viewtopic.php?t=1991 |
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Author: | Dave March [ Wed Apr 06, 2016 12:28 pm ] |
Post subject: | Re: Navigraph Integration |
XML, another one of those creations one has to ask... WHY? ![]() |
Author: | vololiberista [ Wed Apr 06, 2016 12:52 pm ] |
Post subject: | Re: Navigraph Integration |
Try converting a 6 order trendline for a polynomial curve from Excel into XML. The word "nightmare" is totally inadequate! That's why it took months++ to calculate the correct P7 thrust curve for the RR Conway for all elevations and temperatures! |
Author: | vololiberista [ Wed Apr 06, 2016 1:25 pm ] |
Post subject: | Re: Navigraph Integration |
This is how to convert a 4 order curve ![]() ![]() in Excel (267.4242424238*D15^4-2602.7777777738*D15^3+9399.5833333178*D15^2-14868.2979797705*D15)+8711.6903030121 Break it down to 267.4242424238*D15^4 -2602.7777777738*D15^3 +9399.5833333178*D15^2 -14868.2979797705*D15 +8711.6903030121 Then convert it XML: D15 4 pow 267.4242424238 * D15 3 pow 2602.7777777738 * - D15 2 pow 9399.5833333178 * + D15 14868.2979797705 * - 8711.6903030121 + D15 is (A:TURB ENG1 JET THRUST, psf) So the whole calculation is (A:TURB ENG1 JET THRUST, psf) 4 pow 267.4242424238 * (A:TURB ENG1 JET THRUST, psf) 3 pow 2602.7777777738 * - (A:TURB ENG1 JET THRUST, psf) 2 pow 9399.5833333178 * + (A:TURB ENG1 JET THRUST, psf) 14868.2979797705 * - 8711.6903030121 + |
Author: | Dave March [ Wed Apr 06, 2016 2:56 pm ] |
Post subject: | Re: Navigraph Integration |
Well I guess I'll just take your word for it my friend! ![]() |
Author: | vololiberista [ Wed Apr 06, 2016 3:42 pm ] |
Post subject: | Re: Navigraph Integration |
Without the gurus at FSDeveloper I would be dead in the water ![]() |
Author: | ThomasAH [ Wed Apr 06, 2016 3:51 pm ] |
Post subject: | Re: Navigraph Integration |
The Excel is just gibberish to me, on the other hand the RPN calculations you put in the XML gauge scripts look very nice ![]() And it allows to write very compact code, here is something I wrote for the C337 fuel selectors ![]()
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Author: | vololiberista [ Wed Apr 06, 2016 5:32 pm ] |
Post subject: | Re: Navigraph Integration |
You should join the gurus on FSDeveloper Thomas! Tom there is also an expert at condensing superfluous coding! The Excel coding comes from the the ScatterGraph. You get Excel to do a polynomial trendline that matches your graph and then get it to display the equation. For P7 I had to first convert a real graph of maxima and then calibrate the P7 gauges so that they show the correct P7 at idle and at full throttle. Bear in mind that their readings are very much dependant on ambient temperature and airfield elevation. I also had to add in lapse rates as well. In the real a/c the FE would call "Abort" and close his throttles during take-off if the P7 didn't get to at least half a point of the max table. The flight crew also had the P7 target placarded in front of them. This is in the days before Fadec control so the only way to avoid overstressing the engines in hot weather was to throttle up to a lower setting than max. So I had to do that as well as the throttle setting is also placarded. Non of this FMC rubbish ![]() |
Author: | sbsim [ Wed Apr 06, 2016 8:37 pm ] |
Post subject: | Re: Navigraph Integration |
Captain vololiberista, I would recommend to add your insights into LIPZ-LOWI procedures to the sticky thread with your video. It is not only an excellent piece of information, but also a good promo for PF3. I save it for a future use. |
Author: | ThomasAH [ Wed Apr 06, 2016 9:50 pm ] |
Post subject: | Re: Navigraph Integration |
I tried to create this flight plan with PFPX, but it seems EKPEB isn't available with the older AIRAC (AS1302) I have. I could have added it with the waypoint and airway editor, but instead just used what PFPX suggested instead: IBROT Here is the result:
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Author: | ThomasAH [ Wed Apr 06, 2016 9:55 pm ] |
Post subject: | Re: Navigraph Integration |
I see we are on the same page here ![]() |
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