This new page is a re-write of the old hpr.org.uk pages with usefull scientific formulas and explanations that are usefull to understand Rockets from the basics of Newtons Laws to more complicated equations used to design motors and predict their performance. The old HPR.ORG.UK web site contained a lot of out of date information that has now been archived, if you are looking for any of the old information and cant find it please contact us.

Information on this page can be used for educational purposes as long as this site is credited, the contents of this site can not be copied without our permission to other websites or for commercial gain.