Rasp XP is a Windows program that simulates the flight of a rocket in one dimension (one degree-of-freedom). It can be used to get an idea of how high a rocket kit might fly with a particular motor and what the best ejection delay time might be. Rasp XP is an adaption of the venerable RASP program for DOS that was based on the BASIC program by Harry Stine in 1979 from “Handbook of Model Rocketry”. It was converted to C by Mark Storin in 1989. New features were added by Kent Hoult in 1990 and Mark Johnson in 1990-94.
Rasp XP v3.0 includes Larry Curcio”s DigiTrak, based on his version 5.4.
Rasp XP Data Files
Though the Rasp XP program itself does not change very often, the data files that Rasp XP uses are based on current motors and kits. These files are just text files and the Rasp XP help files contain information about how to change them. However, most rocket folks are reluctant to do that. The active rocketeers are interested in the most current motor data – especially when a batch of new motors are tested and declared certified by TRA or the NAR.
There are several places to obtain the thrust curves, assemble the data, and merge the results into a wRASP data file. The recommended location is ThrustCurve.org as they are very good at maintaining a complete and up-to-date collection of motor data files.
This was an interim release for Dallas Area Rocket Society (DARS).
This is a not-quite-complete (documentation lagging) update just because it has been a long time since all of the files were updated.
NOTE on motor database file limitations:
PLEASE NOTE that the NAR motor database WILL NOT run on any version of wRASP prior to version 2.1