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• 20:52, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Isp.png (Graph representing rocket dry and wet mass as function of the Isp. This is clearly exponential on the left because a too low Isp means that orbit cannot be reached, the mass ratio gets too high. Done with version 3 of File:Rocket_mass.c. Delta V is 8300 m)