This fuel has the benefit of being more dense than
other rocket propellants, so you can pack more of it into rocket - fuel tanks — which adds to the power — but the trade - off is that you have to chill it at minus 340 degrees Fahrenheit.
SpaceX engineers will then have to attach four room - size Raptor
rocket engines and two
other engines, plus all of the
other internal
propellant tanks, plumbing, and electronics that a
rocket requires.