MODEL 520 Price.................No. 1 to 39 $45,000 No. 40 & up $66,000 Years Built...................................... 1951 - 1954 Serial No. Range......................................1 - 150 Total Built...............................................150 Power Plant...............................Lycoming GO-435-C2B Rating.....................................260hp @ 3400 RPM Fuel, octane - capacity (Gal)...................91/96 - 145 Fuel Consumption GPH...................................13.5 Propeller..........................90" 2&3-blade, 84" 3-blade Weight (lb), empty - gross........................3800 - 5700 Dimensions : Wing span (Inches) - area (Sq ft)............528.75 - 242.5 Fuselage length - height (Inches).............410.5 - 168.5 Volume, cabin - baggage area (Cubic feet)..........146 - 32 Seats ................................................5 - 7 Performance: Takeoff over 50' obstacle...............................950 Landing over 50' obstacle...............................860 Service ceiling (feet)...............................24,000 Single-engine ceiling.................................8,700 Maximum range (miles).................................1,150 Cruising speed (MPH GS 70% @10,000 ft)..................197 Takeoff - landing speed.............................82 - 77 Best rate-of-climb......................................140