> It would make for a fun app though Like this one? http://orbit.medphys.ucl.ac.uk/ http://orbit.medphys.ucl.ac.uk/ Orbiter is a space sim with accurate orbi

> It would make for a fun app though Like this one? http://orbit.medphys.ucl.ac.uk/ http://orbit.medphys.ucl.ac.uk/ Orbiter is a space sim with accurate orbital mechanics (including the Oberth effect ;). It's a lot of fun. You can use realistic current vehicles for accuracy, or unrealistic ones with huge power-to-weight for fun.