Well, not it isn't. Their current rocket must have a delta-v of about 2.5km/s, so we are speaking of about 3.5-4x increase. Yet, that's a lot. But remember the

Well, not it isn't. Their current rocket must have a delta-v of about 2.5km/s, so we are speaking of about 3.5-4x increase. Yet, that's a lot. But remember their current rocket uses hydrolox. That isn't an easy fuel mix to work with! Russians for example, still haven't managed it.