; Sachsen Feuerwerk / WECO Feuerwerk D7-0, D7-3 ; Created by Sampo Niskanen for OpenRocket, released into the Public Domain ; Thrust curve data taken from: ; http://www.raketenmodellbautechnik.de/produkte/Motoren/SF-Motoren.pdf ; Mass measured by the author from D7-3 motors. D7 25 70 0-3 0.019 0.043 SF 0.079 1.625 0.179 6.979 0.326 18.992 0.355 19.407 0.372 20.426 0.422 20.331 0.48 14.085 0.538 11.536 0.68 9.815 0.96 7.839 1.34 8.253 1.461 2.167 1.582 0.0