Suborbital Rocket Analyzer allows you to determine the operating parameters for a suborbital rocket based on the input parameters. The basis of the system is the rocket equation. By adjusting input, you can do simple sensitivity analysis.
This application makes no effort to save data after shutting down, so you will have to reenter your inputs then. It also does not in any way save the results of your application run, so you will need to write them down to save them.