Sanger's work is required reading...
...For us private space launch entrepreneurs, as well as anyone interested in single-stage-to-orbit. The DynaSoar concept acknowledged Sanger's work.
The basic "skip glide" concept is even now being considered for some theoretical spaceplane concepts by the government.
As an aside, the original Roton concept I worked on owes a lot to another end-of-the-war radical German design, the Focke-Wulf Triebflugel, which unfortunately (at least from an aerospace engineer's perspective) never flew.
