http://www.gizmag.com/walkera-qr-900-hybrid-hexacopter-drone-range-extender/41190/
It will be 1495 usd and its just to plugin between the lipo and the pcb.
I got the info directly from the manufacturer at smartgenerators.com. Their site seem to down atm though.
Technically its not gas...
Hi!
Hakan from Sweden here.
I am a vivid hobby photographer that started to get an interest in aerial video and drones a while back.
I owned 3 different miniquads before purchasing a Q500+ and after that a P3A, both just got sold btw. This autumn i got an increased interest in the aerial part...