The Spacex Falcon Heavy will also use the Merlin 1D and will bring costs down below $1000 per pound to LEO.
Full success with reusable rockets would bring costs down by 100 times.
The Merlin 1D puts out 147,000lb (654kN) of thrust to the 1C's 110,000lb. Nine of the engines power the first stage, and a single vacuum-capable engine powers the upper stage.
Chart adapted form exrocketman.
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