Glad you like them! These were a 'test run' in preparation for developing a class, which I plan to teach next year. With more material. What I think is missing is bridging the gap between 2-body dynamics that many aerospace engineers know and 3-body dynamics, which until now have been a very specialized field.
I wish I could. It's been lost to time (I made it in 1999). If I do eventually get around to re-making some of the old code, it will be at the Ross Dynamics Lab GitHub github.com/RossDynamics
