## Aircraft trim program ACTRIM

ACTRIM is a Matlab program, which can be applied to Simulink implementations of non-linear aircraft models in order to determine steady-state trimmed-flight conditions.

ACTRIM has been written for the Simulink Beaver model, which can be opened by typing `beaver` at the Matlab command line. The trim routine can also be applied to other aircraft models in Simulink if they use exactly the same definitions of the input and state vectors as the system Beaver. However, if this is not the case, it is relatively easy to adapt the source code ACTRIM.M for the new situation (it is recommended to take a closer look at the source-code to see how it works).