Aerion has enlarged the cabin of its supersonic business jet as it continues to fine tune the design in a bid to reassure potential manufacturing partners that the aircraft will achieve its weight and performance targets. Reno, Nevada-based Aerion says it is refining the design and business case in an effort to present manufacturers with "a profitable programme that can move swiftly into full-scale engineering and prototype development". An investor group headed by billionaire Robert Bass is funding initial design and planning while Aerion looks for industrial and financial partners to bear the $2 billion cost of development, which is...