MY sons balsa usa DVIII weighs 14.5 lbs.wing area is about 1000 square inches if i remeber right.he has a homlite 30cc . dont remember if its 1 or 2 rings.stock carb and ignition with a pitts style muffler.flys it perfect.after takeoff it will fly at half throttle no problem.that weight is dry weight ready to fly,no fuel in it.forgot to mention he has a black plastic 18x6 or 18x8 dynathrust prop and i think rpms where about 6800 but im not sure.