This is also using a fairly new engine, the Merlin 1-D http://en.wikipedia.org/wiki/Merlin_1D#Merlin_1D http://en.wikipedia.org/wiki/Merlin_1D#Merlin_1D. It is

This is also using a fairly new engine, the Merlin 1-D http://en.wikipedia.org/wiki/Merlin_1D#Merlin_1D http://en.wikipedia.org/wiki/Merlin_1D#Merlin_1D. It is designed for mass production, using nearly 50% fewer components than the 1-C, and it seems to be flying great! Can't wait for the next launch!