Aerion Corporation, of Reno, Nev., is taking orders now for its supersonic private jet, the Aerion AS2. Last year Airbus Group agreed to lend engineering support to the company, and the aircraft is now in development. The company says its proprietary laminar-flow technology reduces aerodynamic drag over the wings by up to 80 percent, enabling the three-engine jet to achieve efficient long-range flight. Supersonic speeds can cut flight time by 3 hours between Paris and Washington, D.C., and by 6.5 hours between…