[reuters.com] – Siemens, Airbus, Rolls-Royce team up on hybrid-electric propulsion
The take-off is verticle and next the rotors tilt and become propellers. Project began early 2016. Eventually the autonomous chopper could be ordered on demand at a cost of 80% less than conventional helicopters.
Electric airplane Pipistrel Alpha from Slovenia taking off.
17 kWh battery
Battery swap in minutes
300 meter climb per minute
Flight time one hour or longer
Optimized for flight training
Regenerative breaking: descending gives back 13% electricity
Recharge in less than one hour