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Re:Boom (YC W16) – Supersonic Passenger Airplanes by bscholl on Monday March 21, 2016 @05:00PM (#11331991)
schwarrrtz and azernik nailed it.

Today's batteries don't store enough energy for long international flights. There are some battery technologies in the lab (Google Lithium-air batteries) that might make this feasible, but they're not ready yet. Yet alone proven safe to carry passengers.

As fans of speed, we want to bring supersonics to market as quickly as possible. So, we're only using core technologies that have flown on other airplanes and are accepted by regulators.

There's plenty of opportunity for radical innovation in V2 and V3 once V1 is working!

Re:Boom (YC W16) – Supersonic Passenger Airplanes by rdl on Monday March 21, 2016 @08:33PM (#11333490)
Batteries do make sense on aircraft in place of APUs for backup and start and such, of course, just not thrust.