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NASA Provides $100,000 Funding For Supersonic, Fuel-Efficient Ninja Star Jet | Inhabitat - Green Design, Innovation, Architecture, Green Building

An engineer from the University of Miami has received $100,000 from NASA to develop a fuel-efficient supersonic aircraft shaped like a ninja star. Working with a team from Florida State University, Ge-Chen Zha has designed a bi-directional flying wing (SBiDir-FW) that can travel at supersonic speeds without the sonic boom generated by conventional aircraft when they break the sound barrier. This remarkable jet could potentially travel from New York to Tokyo in four hours.

http://aviationweek.com/blog/supersonic-transport-concept-it-coming-or-going

Details of the proposed transition phase from low to high-speed flight, and back again, are not discussed though the design team predicts low g-forces below one.