Supersonic & Hypersonic Civilian Transport Projects in Development

Overture supersonic passenger jet (Credit: Boom Supersonic)

by Douglas Messier
Managing Editor

Boom Supersonic’s recent rollout of its XB-1 supersonic demonstrator aircraft marked a milestone in an accelerating race to revive an era of civilian supersonic travel that ended when the Concorde jetliner was retired in 2003.

XB-1, aka Baby Boom, is set to begin flight tests next year from the Mojave Air and Space Port in California. The Mach 2.2 (2,717 km/h, 1,688 mph) vehicle is the precursor to Boom’s 55-seat Overture airliner, which is scheduled to begin carrying passengers in 2029.

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For Sale: The World’s Largest Airplane*

Stratolaunch takes off. (Credit: Stratolaunch)

As we previously reported, Stratolaunch is up for sale. Paul Allen’s sister Jody Allen, the executor of her brother’s estate, has no interest in continuing the development of the giant airplane, which is designed to air launch rockets.

CNBC reports on the eye popping price tag:

Holding company Vulcan is seeking to sell Stratolaunch for $400 million, people familiar with the matter told CNBC. Vulcan is the investment conglomerate of late billionaire Paul Allen, a Microsoft co-founder. Allen died last October following complications of non-Hodgkin’s lymphoma.

The hefty price tag includes ownership of the airplane as well as the intellectual property and facilities.

Stratolaunch is the world’s largest airplane by wingspan, which stretches 385 feet — longer than an American football field. The plane is powered by six jet engines salvaged from Boeing 747 aircraft.

Allen’s vision of a massive plane that can launch rockets from the air was at least partially fulfilled in April, when Stratolaunch flew for the first time after about eight years in development. Based at the Mojave Air and Space Port in California, the giant airplane flew for more than two hours before landing after what was deemed a successful first flight.

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