Travel Time is a Freeware PalmOS application that allows you to enter miles to travel, enter an average speed (MPH) or select an excellerated speed such as: Light Speed, Sound Speed and 1 Mile Per Second; then the application will calculate the amount of time it will take to travel that distance.
If you enter an average MPH, you may specify any number up to 9999 MPH. The 9999 is not a limitation as much as it is a control for entering realistic numbers.
If you select Light Speed you are opting for a speed of 186262 MPS (Miles Per Second). This also translates to 11,175,720 MPH. This speed is for traveling very long distances. You may also opt to increase the default Factor from 1 to as much as 999. This is a multiplier that will help you calculate shorter times for longer distances at the speed of light.
If you select Sound Speed you are opting for a speed that is calculated based on the Celcius Air Temperature; therefore, a Celcius temperature must be entered. If you do not know what celcius temperature relates to a given farenheit temperature, you can click the "?" button to convert a farenheit temperature to celcius. A window will display where you can enter a farenheit temperature and then you may convert it to celcius. You then have the option to select that converted temperature for use in the Sound Speed formula.
If you select 1 MPS Speed you are opting for a speed of 3600 MPH.