SpaceCAD is the complete solution to design and build your model rockets. The powerful SpaceCAD design software enables you to build a stable rocket in minutes. And with the simple click of a button you can then find out how high the rocket will fly. SpaceCAD supports you in actually building the rocket by providing extensive printout features, like a fin alignment guide or the parachute pattern printer. Additionally, a two-paged printout can be made that describes all the rocket's features. If you order the SpaceCAD key now (no physical shipment), you save US$ 5 from the suggested retail price of US$ 39.95!