Electric is definitely possible. I've had 4 AXI electric motors and have been very happy with them. My first 4-stroke was an OS .91......great motor, hassle free, always started on the first pop. That was on a 4-star 60 with a 72" wingspan. I had flight times over 20 minutes with the OS .91. An OS 1.20 might suffice for an 82" wingspan.