Using the attached nomogram for computing brachistochrone trajectories to other bodies throughout our solar system, I am working with the assumption that this spacecraft travels with a constant acceleration of 1/3 g (right around where the acceleration column says "Mercury/Mars").
The second-to-the-left column of the nomogram lists various drive systems by their thrust capacity in newtons. Where on that column could I plug in a metallic hydrogen rocket?
Edit 1: What value in newtons would correspond to such a drive? You can pretend that you are a mad space scientist with access to experimental tech and near-unlimited funds.