Spreadsheets & Programs

GrainsCAD

The 20ish year old GrainsCAD has recently been updated to include some new features including some internal ballistics modeling and a pretty kewl interactive PEP tool. Due to its age, it might not work on modern windows environments although it appears to work on at least 1 windows 10 desktop. The decision was made to make the complete interface metric units with no option for imperial (about time I pulled myself out of last century). This new update should render the Grains Spreadsheet completely obsolete now which is even more ancient than GrainsCAD.

https://www.propulsionlabs.com.au/Software/GrainsCAD_Test.zip (updated 20/11/23 - Fixed graphical representation of nozzle expansion in PEP simulation

JeffPep - Note: Macros within JeffPep will likely not work with OpenOffice.

Powerful Excel Spreadsheet ultilising modified PEP code that enables basic simulation of common rocket propellant ingredients to gather general performance outcomes and to report the energy that is liberated and with what efficiency that energy is being transferred into kinetic jet exhaust. Approx 1.8MB:

https://www.propulsionlabs.com.au/Software/Jeff_PEP_B3g.xls (updated 11/3/22 - Bug Fix for loading propellant files with more than 5 ingredients)

www.propulsionlabs.com.au/Software/Jeff PEP_B3h.xls (metric units) (updated 11/3/22 - Bug Fix for loading propellant files with more than 5 ingredients)