Boom Technology now plans to fly a supersonic demonstrator for a future Mach 2.2 airliner up to two years late by the end of 2019, says chief executive Blake Scholl.

The XB-1 demonstrator, nicknamed "Baby Boom", was scheduled to achieve first flight in late 2017, but that time line was delayed a year ago to later in 2018.

During an airshow presentation yesterday, Scholl confirmed that the first flight for the XB-1 will be delayed again to 2019.

The entry into service of the M2.2, 55-seat airliner remains set for 2025, despite the new delay, Scholl says.

Boom fell behind schedule by taking more time to optimise the aerodynamics of the XB-1 and switching to a different variant of the GE Aviation J85 engine.

"The big risks in the programme are in the rear-view mirror," Scholl says.

The $200 million airliner is being designed to travel 2.6 times faster than most subsonic jets, but for the same cost per seat mile as a business-class flight.

A future factory operated by Virgin Galactic in California will be sized to build 60 aircraft per year.

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Source: Flight Daily News