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Proairshow, LLC

Air Show Narration & Sound Services

307 West Fredericks Street

Anderson, South Carolina 29625


Thanks to the efforts of engineers such as Ryland S. Barlow, Thomas H. Watson and others at the US Army Aviation Applied Technology Directorate, Ft. Eustis, Virginia, a MS Office Excel Workbook has been developed that emulates the obsolete BASIC code of the Trajectory Analysis Program utilized in the 1990 report "AIRCRAFT DEBRIS TRAJECTORY ANALYSIS" published on this website.

This Excel Workbook rapidly computes the down range potential of of specified debris and present this information in a graphical and text format.


Debris Trajectory Analysis
based on Hugh Oldham's BASIC TAPS program, v. 1.10, 8/20/90
Trajectory analysis for aircraft debris.(
Modified for MS. EXCEL calculations and display, 10/21/02
By T Watson, Aviation Applied Technology Directorate, USAAMC, Ft. Eustis, VA
Excel edited 10/23/02 by Hugh Oldham to expand down range capability.
WARNING: Numbers do not take into account small objects splintering off of aircraft Debris.
Directions:  Fill in requested information in the highlighted cells below.  
Trajectory Paths are displayed below, and in the worksheet titled "Trajectory Chart."
Calculations are in the worksheets titled by their respective angles.
Data for user specified flight angle displayed to right of input data
Required Variable Units Input   Data for Angle of 30 Degrees
Initial Indicated Airspeed kts 400   Data  Value Units
Initial Flight Path Altitude ft AGL 300   Debris Terminal Velocity 134.0 MPH
Initial Flight Path Density Altitude ft AGl 300   Debris Terminal Velocity 116.5 kts
Ground Level (MSL) ft MSL 0   Time to Impact 12.9 sec
Flight Path Course deg 360   Debris Throw Distance 2192.8 ft
Frontal Area of Debris Sq. ft 0.25   Angle of Impact -70.1 deg
Drag Coefficient, Cd   0.44   Speed of Impact 135.6 MPH
Weight of Debris lbs 5   Speed of Impact 117.9 kts
Surface Wind Speed kts 0   Max Altitude 815.1 ft
Surface Wind Direction deg 180            
Specific Desired Flight Path Angle deg 30            

The full, interactive Excel Workbook is available.

Right click below to download   

Final Thrown Trajectory Blade Analysis HEO2.xls

or write to:

Proairshow, LLC

307 W. Fredericks St.

Anderson SC 29625-2452

or email to: and we will promptly email the worksheet back to you.

Please be advised the file is large, approximately 6 Megabytes, requiring the appropriate downloading time for your connection speed.

Hugh Oldham