Quieter supersonic aircraft will be a requirement if supersonic flight is ever to become commonplace over populated areas. As things
stand now, there are many restrictions to supersonic flight (thanks Aerospaceweb
for the article). 1)DFRC photo gallery of modified F-5E
2)NASA Shaped Sonic Boom Demostration Project
3)NASA Langley tech brief - sonic boom tests of supersonic business plane
4) Sonic Boom Reduction using an Adjoint Method for Supersonic Transport Aircraft Configurations (PDF)
5) Adjoint-Baed Sonic Boom Reduction For Wing-Body Configurations in Supersonic Flow (PDF)
6) Spaceflight Now article
7) Slashdot discussion about Spaceflight Now article
