IPFS News Link • Transportation: Air Travel
Demonstration supersonic plane will fly at mach 2.2 by the end of 2019
• https://www.nextbigfuture.com, brian wangThe XB-1 will fly at mach 2.2 by the end of 2019. It is being built now.
Boom Aerospace is using new more efficient engines. Afterburners will not be needed to reach supersonic speed. Materials are lighter and improved. Inlet and other designs are more efficient.