PT6A-27 Turboprop modified 680 hp Cruise speed : 150 knots 173 mph 278 km/h, Stall speed :58 knots V SO , gross weight, landing configuration, Range :920 nautical miles 1,050 mi ,690 km, Service ceiling : 25,000 ft 7,620 m, Rate of climb : 1,600 ft/min 8.1 m/s. You may wonder