Even if you need to burn gas to complete the flight, using as much electricity as possible is *obviously* a cost savings...
It's not clear from the picture but the wingspan is big for what it is. 31m (101ft) for a 30 seat aircraft, the Boeing 727-800 is 25m (117ft) for 160-180 passengers. Long wings improve efficiency...
So like I said, viability is borderline, but they have something like 250 firm orders from airlines, so like I said, the pot of gold is rich...
