  Warp drives in Einstein's general theory of relativity provide a unique
mechanism for manned interstellar travel. It is well-known that the classical
superluminal soliton spacetimes require negative energy densities, likely
sourced by quantum processes of the uncertainty principle. It has even been
claimed by few that negative energy densities are a requirement of superluminal
motion. However, recent studies suggest this may not be the case. A general
decomposition of the defining variables and the corresponding decomposition of
the Eulerian energy are studied. A geometrical interpretation of the Eulerian
energy is found, shedding new light on superluminal solitons generated by
realistic energy distributions. With this new interpretation, it becomes a
relatively simple matter to generate solitonic configurations, within a certain
subclass, that respect the positive energy constraint. Using this newfound
interpretation, a superluminal solitonic spacetime is presented that possesses
positive semi-definite energy. A modest numerical analysis is carried out on a
set of example configurations, finding total energy requirements four orders of
magnitude smaller than the solar mass. Extraordinarily, the example
configurations are generated by purely positive energy densities, a tremendous
improvement on the classical configurations. The geometrical interpretation of
the Eulerian energy thus opens new doors to generating realistic warp fields
for laboratory study and potential future manned interstellar travel.
