Not "massive". The empty stage is very light, so a little propellant goes a long...

		schiffern on April 23, 2013 \| parent \| context \| favorite \| on: SpaceX Grasshopper Flies High Not "massive". The empty stage is very light, so a little propellant goes a long way. It's less than 10% of the fuel for the entire descent phase (and the optimal upper stage length goes up to compensate somewhat).