I am currently building a 64" extra type plane. I want this plane to have sufficient power to be fully capable. It should weigh no more than 8.5lbs in the air, probably less but we'll see. I've been looking at a magnum 120 4 stroke but I wonder if a thunder tiger 91 4 stroke will do it. I know a magnum 91 4 stroke will hover a 8.25lb plane but it will not pull vertical out of the hover. I want for this plane to pull out of the hover and have responsive torque.
Any input will be appreciated. Do the larger 2 strokes have good torque?