Wright Model CH - Hard300Wright Model CH - HardView from Lunar Orbiter - Hard300View from Lunar Orbiter - HardGlenn H Curtiss in Reims Racer - Hard300Glenn H Curtiss in Reims Racer - HardFrederick Nelson Atwood Ledger Page - Hard300Frederick Nelson Atwood Ledger Page - HardFarman 1910 Biplane in Flight - Hard300Farman 1910 Biplane in Flight - HardDouglas C-47 Skytrain Cockpit - Hard300Douglas C-47 Skytrain Cockpit - HardBristol Buckingham - Hard300Bristol Buckingham - HardBoeing Model 314 Clipper - Hard300Boeing Model 314 Clipper - HardBoeing B-17F Flying Fortress - Hard300Boeing B-17F Flying Fortress - HardAerocar Model III - Hard300Aerocar Model III - HardWright Model CH - Easy35Wright Model CH - EasyView from Lunar Orbiter - Easy35View from Lunar Orbiter - EasyGlenn H Curtiss in Reims Racer - Easy20Glenn H Curtiss in Reims Racer - EasyFrederick Nelson Atwood Ledger Page - Easy36Frederick Nelson Atwood Ledger Page - EasyFarman 1910 Biplane in Flight - Easy24Farman 1910 Biplane in Flight - EasyDouglas C-47 Skytrain Cockpit28Douglas C-47 Skytrain CockpitBristol Buckingham - Easy28Bristol Buckingham - EasyBoeing Model 314 Clipper - Easy30Boeing Model 314 Clipper - EasyBoeing B-17F Flying Fortress - Easy56Boeing B-17F Flying Fortress - EasyAerocar Model III - Easy30Aerocar Model III - Easy