Jack Mattingly's Web Site

Over the last twenty years, I have written an array of computer programs for educational use in the field of gas turbine engines and their design. I started with a set of gas turbine engine cycle analysis programs (ONX and OFFX) for use with Aircraft Engine Design, First Edition (1987) that were available along with the textbook from the American Institute of Aeronautics (AIAA). Later on I developed the aircraft system program AEDsys to help with the analysis of Chapters 2 through 7 of Aircraft Engine Design which was used in professional courses I taught and courses at USAF Academy and AFIT.

In 1995 I released a suite of five programs (AFPROP, COMPR, PARA, PERF, and TURBN) combined with the new McGraw-Hill textbook Elements of Gas Turbine Propulsion, First Edition. In 1996, the ONX and OFFX programs were modified to include engine controls and included with Aircraft Engine Design, First Edition along with its user guide in Adobe Acrobat format. The ECAP and EOPP gas turbine engine analysis programs, along with other programs by Professor David Pratt at the University of Washington, are included in the third edition of Gordon C. Oates' AIAA textbook Aerothermodynamics of Gas Turbine and Rocket Propulsion.

The newest versions of AEDsys, ONX, COMPR, and TURBN are included on a CD-ROM with Aircraft Engine Design, Second Edition (2002) along with the new INLET and NOZZLE programs. These programs are included in the AEDsys Software Suite along with six other programs (AFTRBNR, ATMOS, EQL, GASTAB, KINETX, and MAINBRN) written by Professor David Pratt. Go to the AEDsys Software Suite to view description, user guide and/or example screens of these programs.

Gas Turnine Cycle Analysis Programs

• ECAP - Engine Cycle Analysis Program. This program calculates the variation in performance with design parameters of gas turbine engines (ideal and real) in support of Chapters 5 and 7 in Gordon C. Oates' AIAA textbook Aerothermodynamics of Gas Turbine and Rocket Propulsion, Third Edition. This program was written in QuickBASIC with user-friendly pull-down menus and data fields. It is supplied in executable code with the 1997 edition of Oates' book from AIAA.
• EOPP - Engine Off-Design Performance Program. This program calculates the variation in an engine's off-design performance with changes in flight condition and throttle in support of Chapter 8 in Gordon C. Oates' AIAA textbook Aerothermodynamics of Gas Turbine and Rocket Propulsion, Third Edition. This program was written in QuickBASIC with user-friendly pull-down menus and data fields. It is supplied in executable code with the 1997 edition of Oates' book from AIAA.
• OFFX - Off Design analysis of gas turbine engines (Version 2.2 - May 1996). This program calculates engine performance and supports the first edition of the AIAA textbook Aircraft Engine Design (1987). It was written in FORTRAN with user input menus and data. This program along with the ONX program in executable codes and the user manual in Adobe Acrobat format were included in the first edition, fifth printing of the textbook Aircraft Engine Design, First Edition. Download ONX and OFFX User Guide
• ONX - On Design analysis of gas turbine engines (Version 2.2 - May 1996). This program performs engine parametric calculations and supports the first edition of the AIAA textbook Aircraft Engine Design (1987). It was written in FORTRAN with user input menus and data. This program along with the OFFX program in executable codes and the user manual in Adobe Acrobat format were included in the fifth printing of the first edition of the textbook Aircraft Engine Design, First Edition. Download ONX and OFFX User Guide
• ONX - On Design analysis of gas turbine engines (Version 5.111 - April 2004 for Windows). This program performs engine parametric calculations and supports the AIAA textbook Aircraft Engine Design, Second Edition (2002). Program user guide (1.4MB pdf). Download a prior version free - ONX V3.23, Jan 2000 (1.6MB) and copy the self extracting zip file Onx.exe. Updated version of this program are now included within the AEDsys system analysis program included with Aircraft Engine Design, Second Edition.
• PARA - Parametric Analysis of Gas Turbine Engines (Version 3.1 - Sept 1995). This program calculates the variation in performance with design parameters of gas turbine engines (ideal and real) in support of Chapter 5 and 7 in Elements of Gas Turbine Propulsion (1996). This program was written in QuickBASIC with user-friendly pull-down menus and data fields. It is available in executable code with the textbook from McGraw-Hill. (Also available at EGTP zip (635 KB) and copy the self extracting zip file egtp.exe)
• PARA - Parametric Analysis of Gas Turbine Engines (Version 4.014 - Feb 2003 for Windows). Download this version free - PARA V4.0 (2.4MB) and copy the self extracting zip file Para.exe.
• PERF - Performance Analysis of Gas Turbine Engines (Version 3.11 - Sept 1997). This program calculates the variation in an engine's performance with changes in flight condition and throttle in support of Chapter 8 in Elements of Gas Turbine Propulsion (1996). This program was written in QuickBASIC with user-friendly pull-down menus and data fields. It is available in executable code with the textbook from McGraw-Hill. (Update available at EGTP zip (635 KB) and copy the self extracting zip file egtp.exe)

Aircraft/Engine System Analysis

• AEDsys - Aircraft Engine Design System Analysis Software (Version 3.111 - April 2004 for Windows). This program calculates the performance constraints (wing loading versus thrust loading) and aircraft system performance plots (contour plots) in support of Chapters 2, 5-7 in Aircraft Engine Design, Second Edition; and the fuel use and aircraft/engine performance in support of Chapters 3 through 7 in Aircraft Engine Design, Second Edition. It is written in Visual Basic 6 with user input menus and data fields (program contains off-design code of OFFX for use in predicting engine performance). Program user guide (4.2MB pdf). Download this prior version free - AEDsys V1.26, Jan 2000 (2.7 MB) and copy the self extracting zip file AEDsys.exe.

Component Preliminary Design

• COMPR - Multistage Axial Flow Compressor Design (Version 3.11 - Feb 1998). This program calculates the mean-line design of multistage axial flow compressors in support of Chapter 9 in Elements of Gas Turbine Propulsion (1996). This program was written in QuickBASIC with user-friendly pull-down menus and data fields. It is available in executable code with the textbook from McGraw-Hill. (Update available at EGTP zip (635 KB) and copy the self extracting zip file egtp.exe)
  
• COMPR - Multistage Axial Flow Compressor Design (Version 5.111 - April 2004 for Windows). This program calculates the mean-line design of multistage axial flow compressors in support of Chapter 8 in Aircraft Engine Design, Second Edition. Program user guide (1.7MB pdf). Download a prior version free - COMPR V4.3, Jan 2000 (1.7 MB) and copy the self extracting zip file Compr.exe.
  
• INLET - Two-Dimensional Supersonic Inlet Design (Version 3.111 - April 2004 for Windows). Program user guide (1.0MB pdf).
  
• NOZZLE - Axisymmetric Nozzle Design (Version 3.111 - April 2004 for Windows). Program user guide (1.0MB pdf).
  
• TURBN - Multistage Axial Flow Turbine Design (Version 3.1 - Sept 1995). This program calculates the mean-line design of multistage axial flow turbines in support of Chapter 9 in Elements of Gas Turbine Propulsion (1996). This program was written in QuickBASIC with user-friendly pull-down menus and data fields. It is available in executable code with the textbook from McGraw-Hill. (Update available at EGTP zip (635 KB) and copy the self extracting zip file egtp.exe)
  
• TURBN - Multistage Axial Flow Turbine Design (Version 5.111 - April 2004 for Windows). This program calculates the mean-line design of multistage axial flow turbines in support of Chapter 8 in Aircraft Engine Design, Second Edition. Program user guide (1.1MB pdf). Download a prior version free - TURBN V4.3, Jan 2000 (1.7 MB) and copy the self extracting zip file Turbn.exe.

Other

• AFPROP - Air/Fuel Properties. (Version 2.1 - Sept 1995). This program calculates the thermodynamic properties of air and jet fuels at low pressure in support of the textbook Elements of Gas Turbine Propulsion (1996). This program is available in both QuickBASIC source code and executable code with the textbook from McGraw-Hill. (Also available at EGTP zip (635 KB) and copy the self extracting zip file egtp.exe)