"Weight" is a very simple Newton app for pilots.  I wrote it last year while learning Newton Programming.  It does one thing - It calculates the total weight of passengers, baggage, and fuel for a four seat airplane.  You can compare the useful load of a few airplane models.Source code included.  If you want any changes, you'll have to make them yourself - I don't have Newton Toolkit anymore.Jeff Hokitjhokit@scruznet.com