• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

    • Tag FS2020 specific questions with the MSFS2020 tag.
    • Questions about making 3D assets can be posted in the 3D asset design forum. Either post them in the subforum of the modelling tool you use or in the general forum if they are general.
    • Questions about aircraft design can be posted in the Aircraft design forum
    • Questions about airport design can be posted in the FS2020 airport design forum. Once airport development tools have been updated for FS2020 you can post tool speciifc questions in the subforums of those tools as well of course.
    • Questions about terrain design can be posted in the FS2020 terrain design forum.
    • Questions about SimConnect can be posted in the SimConnect forum.

    Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.

    By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.

FSX Acceleration AIR file

No idea if this is allready know but the FA-18 of FSX Acceleration introduces two new sections in the AIR file. I was able to decode one section: Table 154a

Table 154a is a new and more fexible table for the wave drag or mach drag and replaces the old table 430. The table is still limited to Mach 3.2 but and allows to design a more accurate Wave Drag curve.


This may be of interest for all the people who develope fast movers. But caution: FSXA AIR files are not compatible with FSX.

Section 1549 is for me at the moment a big mistery. Perhaps can someone help decoding this section.

A little bit more details about this things are on my (German) blog: http://ootb.wordpress.com/2008/07/06/fsxa-aam-1/

Furhtermore I have published an updated AAM.INI on my webpage www.fsdossier.info. With the new INI files you can see and edit Tab 154a. The table is at the very beginning of the section list.
Direct download: http://www.fsdossier.info/files/aam.ini

My apologise if this was allready know.
it's very interested, first time I noticed this.

And I have the question about the INI file, can I using it with airedit?:p

Perhaps you didn't notice (I noticed it only today), but in the ESP SDK there is at last some documentation related to the AIR files. The mentioned SDK can be read at http://msdn.microsoft.com/en-us/library/cc526961.aspx .

Try the JetSample.asm - apparently section 1549 is just what a nozzle animation table:

    ;Nozzle animation table and afterburner offset (if primary nozzle available)
    ; The output is the percent open of the primary nozzle (max 1.0)

        FLOAT32 0.30 ;Offset due to afterburner state

    ;Exhaust nozzle table  (max 4 rows, 3 columns)
    ;IN:  X: mach,
    ;IN:  Y: Corrected N1
    ;OUT: Primary Nozzle Pct open
    UINT32 4,3    ;ROWS,COLS
                 ;N1     M-lo   M-hi
        REAL8    0.00,  0.80,   1.05 
        REAL8   40.00,  0.55,   0.80 
        REAL8   65.00,  0.62,   0.85
        REAL8   96.00,  0.70,   0.90         

Maybe you already knew about all that, but anyway it's here.

Hi Rafael,

yes, I noted the ESP SDK and I allreday started the rewriting of the AAM.INI file from scratch. I hope it will take not to long to finish this work.