Technical data Displacement: 8,93ccm Power approx. (1.7) (hp) at 16,000 rpm Speed range: 2,000 - 17,000 rpm Bore: 23,0mm Stroke: 21,5mm Total weight: 512g Carburettor: 40L Shaft thread 1/4"-28 UNF Weight 404g Length to hub: approx. 85.4 mm Width: approx. 51 mm Height: approx. 91.1 mm Spac. Lengthwise position holes 17.5 mm Crosswise 44 mm Pilot hole Ø 3.2 mm Recommended propellers: 12x7" / Sport and aerobatics: 12x7" / 12x8" / 13x6" / 13x7"