SET UP your 'preferred' aircraft performance 

when using the ATC2k.EXE

 


Read the text below to understand the basic philosophy and then download the XLS file by clicking on the book in the column to the right

 

Download XLS file here

 

Using the ATC2k in order to develop your own exercises for your local ATC SIMULATOR you usually arrive very early to two very contrasting situations :

As personal experience has showed however there is an easy way out in getting the two sets of performance 'together' . In real life you usually find two software situations 

 a) Inability in changing the performance software of the simulator

 b) Possibility in changing the performance if you enter known values at every FL or regions of FL . 

By knowing exactly how the aircraft performance is defined in the ATC2k programme and how it is then calculated for every FL provides you with two possibilities that work easier that you think :

  1.  Change your ATC2k performance to meet the ones of your main local ATC simulator , or
  2. See how your ATC2k calculates all intermediate FL performance and transfer them to your main simulator 

  The XLS file provided by Vic Day and formulated by me carries out all pertinent calculations . Let us remember how the performance is defined . You need only one line by which you enter something like :

 

C550    410 400 125 2200 500 3000 1070

where :

C550            is the name / identity for this type ( you put anything you want there )

410               is the CEILING of FL

400              is the maximum TAS expected at Ceiling

125              is the minimum speed expected on take-off

2200           is the maximum rate of climb on ground

500             is the minimum rate of climb possible

3000           is the minimum rate of descend at Ceiling

1070           is the minimum rate of descend in the ILS area

By inputting the proper values in the yellow input line of the XLS you get all intermediate FL changes of TAS , IAS , Mach Nr & rate-of-climb/descend for every FL between 0 and 470 ( the #VALUE# will appear at areas outside the performance envelope where values are not calculated as not necessary ) . See below a worked example 

The gray areas are not to be touched as they contain intermediate calculations necessary to complete some more complex calculations  . You just receive your results on the bright coloured columns 

Are these 'trusted values' : Well there is a 'bizarre' history behind aircraft performance in ATC training . People are never happy with them  and strongly disagree between different areas ...but ...when people can set the performance they feel right then they accept it ! The values proposed by software companies or other sources for some reasons do not satisfy ATC instructors . The simple answer behind it seems to be the different behaviour of pilots in different areas . 

For example , what is the answer to the question : How fast is your car running ? Would you ask your car dealer for the answer , or you would rather ask ...  yourself !

 

In mathematical terms the functions are all asymptotic exponetial graphs that are here immitated by parts of sine-cosine graphs which however produce excellent results in practice . Instructors that may so arrange their preferred performance will tell you how nicer results they can get that way !

 

Let us also remember another nice feature of ATC2k :

Exaple : See the diffrence between the following :

B744    430    500    2500    1700    2900    1000

B744-    430    470    2000    1700    2900    1000

 

The second aircraft defined as type B744- has less speed and lower rate of climbing than the first one defined simply as B744 ! For the data base there are actually 2 different types but only the B744 appears for the student in the flight plan

 

For any further questions please contact me at imansola@pt.lu

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