  All known interstellar transportation methods encounter monumental
technological or engineering roadblocks, or even rely on speculative unknown
science. In particular light of the recent public excitement and ensuing
disappointment regarding the exotic "EM drive" it is worthwhile to point out
that propellantless space travel is eminently possible based on well
established physical principles. Here a new mode of transport is proposed which
relies on electric-field moderated momentum exchange with the ionized particles
in the interstellar medium. The application of this mechanism faces significant
challenges requiring industrial-scale exploitation of space but the
technological roadblocks are different than those presented by light sails or
particle beam powered craft, and may be more easily addressed depending on the
uncertain march of technology. This mode of space travel is well suited to
energy efficient travel at velocities less than or of order 0.05c and compares
exceptionally well to light sails on an energy expenditure basis. It therefore
represents an extremely attractive mode of transport for slow (~multi-century
long) voyages carrying massive payloads to nearby stellar neighbors. This would
be useful for missions that would otherwise be too energy intensive to carry
out, such as transporting a generation ship or bulk materials for a future
colony around Alpha Cen A.
