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Warp Drive Concepts v0.4 describes the fusion detonation stack that provides the energy for warping spacetime through expansion and contraction waves that lunge the spacecraft forward for faster-than-light travel. This early edition illustrates this one concept. Later editions with additional concepts are planned for release later this year. Mathematical calculations are included that define a procedure for determining the distance that spacetime is warped with each pulse of the engine as well as corresponding transit times to interstellar destinations. The final chapter develops a technology horizon approach equation to estimate the year of the first test flight with warp signature.