EuroHarmony Community Forums

Archive => EuroHarmony VA => Old Forum => Technical discussions => Topic started by: EHM-1001 Robert on September 06, 2004, 09:00:42 pm

Title: FS flight dynamics engineering...
Post by: EHM-1001 Robert on September 06, 2004, 09:00:42 pm
I am very dissappointed!

As a real life engineer it was always a big mistery to me, what could be stored inside the aircraft.cfg file of aircrafts.

I realized eariler that our 747 do not have realistic fuel useage. I decided to improve the FDE a bit, got some scaled drawing of the plane, and the proper Microsoft SDK. I remade all the geometric, weight, fuel, loads, dimensions... constants after my materials very accurate. The result? ... : A much heavier 747, that needs more space for takeoff (lets say its ok until this point)... then it overtakes the Concorde, when get airborn. It flies at 300 KIAS at 2000' with minimum thrust and accelerate to 700 KIAS with full throttle.

I am very dissapointed... I had a theory,  that the virtual FS aerodynamics is a simplified model of the real one, built up with simplified formulas and models, which needs exactly those constants and datas that are stored in the aircraft.cfg. I thought if I set them accurately, then I will get a superb plane that flies as accurate in the virtual sky, as the real one in the real sky...but not!

Afterall, I do not understand the importance of those hundreds of datas, that can be configured...

:'(
Title: FS flight dynamics engineering...
Post by: EHM-1343 Jonathan on September 06, 2004, 09:19:13 pm
Nice rersearch robert. Dosen't make a bit of sense to me. i'll leave all of the technical jargen to you and i'll stick to flying:>
Title: FS flight dynamics engineering...
Post by: EHM-1077 Emanuele on September 06, 2004, 10:15:15 pm
You need to switch to X-plane to get
to that kind of engineeristic realism...

Nice try though... =)

Ciao ciao!

Manu
Title: FS flight dynamics engineering...
Post by: EHM-1001 Robert on September 06, 2004, 11:01:13 pm
Well, I did not gave up yet. I will try to analize the AIR file too for better results. I found some constants that shows a probably high level of aerodynamic model inside FS, so at the moment I keep the faith... wilco later ;)
Title: FS flight dynamics engineering...
Post by: EHM-0695 Scott on September 07, 2004, 02:11:10 am
I think you will find that many of the critical aerodynamic parameters are still contained in the .air file.
Title: FS flight dynamics engineering...
Post by: EHM-1001 Robert on September 07, 2004, 01:25:24 pm
Well, what I do not understand is, many parameters are duplicated. Some of them are there in the AIR file, and in the CFG too. It seems though, the CFG parameters have higher priority. I  think it because I red in the SDK documentation that if a record is missing from the CFG, the program will build it from the AIR file.
Title: FS flight dynamics engineering...
Post by: EHM-1365 Benjamin on September 08, 2004, 03:05:03 pm
Talking of complicated cfg files, does anyone know where in the directory you can find the coordinates for the different gates at the airports (if it's posssible)??
Title: FS flight dynamics engineering...
Post by: EHM-1001 Robert on September 08, 2004, 04:26:51 pm
Gate positions are stored in AFCAD files. These files are zipped into many big BGLs.

Loc: FS2002/Scenedb/Afdfiles/Scenery/
RegionName.bgl ... But it is too complicated. You can easily open the AFCAD files with a program: "AFCAD", the editor.
Title: FS flight dynamics engineering...
Post by: EHM-1365 Benjamin on September 09, 2004, 03:31:16 pm
Great, thanks Robert:]