I lack the knowledge to be able to say whether the results are realistic, but from a Simulink point of view, it is a nice example. And with the wiki next to it, a lot of information is provided on how the model works.
A suggestion for next time is to play with the graphical environment. For example, you could have fitted subsytems with images of a black hawk or a rotating blade. It would also be nice to update your graphs during the simulation (by using an m-file).