Computer Assisted Design (CAD) environments have become important devices for the design and evaluation of flight control systems. For general use, different aircraft and operational conditions should be easily implemented in such a CAD environment and it should be equipped with a set of simulation and analysis tools. To extend its functionalities, it is best integrated in a highperformance computing environment with an extensive library of control design routines. This report documents the CAD environment DASMAT, which stands for Delft University Aircraft Simulation Model and Analysis Tool. It operates in the computing environment MATLAB/SIMULINK, having highperformance numeric s computation and visualization functionalities. The essential element in the DASMAT package is a generic nonlinear simulation model conceived with well-defined and generalized interfaces. For linear flight control design, the package contains special tools for trimming and linearizing the aircraft at user-defined operating points. A finished design may be evaluated by visualizing the time behaviour in nonlinear simulations. Both on-line and off-line analysis functions are available with the possibility of 3D flight-path and attitude visualization trough animation. For analyzing flight test data, the package also includes identification routines of which results are easily implemented in the simulation model. After a short introduction of DASMAT, this book focuses on the models, signals and variables present in the DASMAT package. The operational aspects for the simulation and analysis tools are discussed next, followed by the application of the DASMAT package for control design purposes. The appendices include a complete list of files of the DASMAT package, the complete lists of signal formats and all essential variables used in the generic models, and the lay-out plus equations of the SIMULINK models.