to improve the overall package, through an easier user interface, as well as more comprehensive output data. DATCOM+ While the original DIGDAT program has been left relatively untouched, there has been a new front-end created that will allow the user to name the input file with something more significant than FOR005.DAT. The new input file format allows the user to place comments in the input file. There have also been hooks placed in the DIGDAT that allow for alternate outputs in addition to the original output format, which is 132 columns wide and not easily imported into another application. There is a graphical representation of the aircraft output in AC3D, as well as data table output in XML for the JSBSim and FlightGear projects, as well as a free-format LFI (Linear Function Interpolation) data table file. Along with the DIGDAT program, there are viewers for the AC3D, XML, and LFI format output files. Data tables can easily be output to the screen or to PNG files for inclusion into reports. Mathworks Aerospace Toolbox Aerospace Toolbox includes a function for importing output files from Digital DATCOM into MATLAB. This function lets you collect aerodynamic coefficients from static and dynamic analyses and transfer them into MATLAB as a cell array of structures, with each structure containing information about a Digital DATCOM output file. OpenDatcom OpenDatcom is an open-source GUI for the Digital DATCOM created and hosted by the OpenAE community. OpenDatcom incorporates all the basic (non-experimental) functionality supported by the Digital DATCOM while providing real-time input error and bounds checking. An alpha version of the program was released November 1, 2009 to the general public. The OpenAE.org web site is no longer active. Predicting Aerodynamics of Structurally Damaged Aircraft There has been some research in using Digital DATCOM in conjunction with wind tunnel studies to predict aerodynamics of structurally impaired aircraft. Dr. Bilal Siddiqui at DHA Suffa University presented an approach to predict the nonlinear aerodynamics of a structurally damaged aircraft model based on the engineering level aerodynamic prediction methods, DATCOM. Raw results from the code provide good correlation with wind tunnel data at very low angles of attack, but accuracy deteriorates rapidly as the angle of attack increases. A new methodology is then proposed which combines the experimental results of healthy aircraft with the predicted aerodynamics of the damaged cases, to yield better correlation between experimental and predicted aerodynamic coefficients for