I would love to see the numbers for this. A significant part of the volume in a ballistic rocket is oxidizer which a jet does not need to carry. Liquid methan

I would love to see the numbers for this. A significant part of the volume in a ballistic rocket is oxidizer which a jet does not need to carry. Liquid methane is much less dense than jet fuel, so it makes sense it would take up much more volume. Also, methane has less carbon in it than jet fuel on a per energy basis. Still suspect you are right.