Will, it's 1/16th the kinetic energy required for the stage to get to orbit, but not 1/16th of the total kinetic energy needed. Most of the s2 mass is fuel, of

Will, it's 1/16th the kinetic energy required for the stage to get to orbit, but not 1/16th of the total kinetic energy needed. Most of the s2 mass is fuel, of which very little is taken to orbital velocity.