Since the year 2003, I do the design of simulation models and
program enhancements for the X-Plane™ flight simulator.

It allows the simulation of actual flight physics and is used by
smaller aircraft companies in development.

Burt Rutan's SpaceShipOne was developed in part with the X-Plane™ flight simulator.

The current state of my developments may soon be back on X-Planer
to be purchased and partly downloaded freely.