[arista]

[USA airline United has announced plans
to buy 15 new supersonic airliners and
"return supersonic speeds to aviation" in the year 2029.

Supersonic passenger flights ended in 2003 when
Air France and British Airways retired Concorde.

The new Overture aircraft will be produced
by a Denver-based company called Boom,
which has yet to flight-test a supersonic jet.

United's deal is conditional on the new aircraft
meeting safety standards.

That can take the form of "posh biodiesel" made
out of everything from waste animal fat from
the farming industry to specially grown
high-energy crops, explains Dr Guy Gratton,
associate professor of aviation and
the environment at Cranfield University.]


https://www.bbc.co.uk/news/technology-57361193