Analysts: Many Contenders, but Little Space for Supersonics
The field of supersonic contenders is growing increasingly crowded but the market may only sustain one or two of them, analysts believe.
Boom rolled out its one-third scale XB-1 demonstrator on October 7, it measures 71 feet long, or roughly a third of the length of the planned Overture supersonic airliner.
Boom rolled out its one-third scale XB-1 demonstrator on October 7, it measures 71 feet long, or roughly a third of the length of the planned Overture supersonic airliner.

While the ban on supersonic flight over land is still in place, the field of supersonic contenders is growing increasingly crowded as new prospective developers jump into the fray while others accelerate their pace of development.