Prototype delivered.
Fuel Cost? $1 hr projected.
The Fuel? Electricity. Total cost "Wet" ( or equivalent ) $13 / hr. ( then add your bank note, Instructor and FBO margins ). Range 2.75 hrs+ depending on the Regen of the Prop via touch and go's and the Solar Panels on the wings.
Go here for more..http://www.sunflyer.com/#!SUN-FLYER-2SEAT-POC-PROTOTYPE-DELIVERED/c21xo/56d872410cf25a66a5368512
Talk about a paradigm changer to train said Pilots...