Create flightplans that circle a user defined lat/lon with the specified number of loops and legs per loop.

Create flightplans that dump you out on runway heading. if you select an airport runway as the destination, the pattern will start at the end of the downwind leg, and terminate at the runway threshold.

Practice vectoring any number of aircraft to a multiple runway airport.
After opening, click Start to run the simulator.
Add planes one at a time or continuously by respectively clicking "Add Plane" or "Add Planes".
Click Help on the application menu for more detail.