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Monomail 221
Monomail 221
Conceptually similar
Model 221A Monomail
Model 221A Monomail Loading Passengers
Model 221A Monomail Passenger Cabin, Looking Aft
221A Monomail at Boeing Field Hangar
Boeing Monomail on Apron
Model 221 Monomail
Model 221 Monomail Landing Gear
Model 221A Monomail at Boeing Field
Model 200 Monomail on Tarmac
Model 200 Monomail in Flight
Loading Mail into a Monomail
Model 200 Monomail on the Ground
Boeing Monomail Cockpit
Model 200 Monomail Loading Cargo
Monomail on Tarmac
Model 200 Monomail in Flight
Model 200 Monomail Wing Jig Assembly
Model 247 Air to Air
Model 247 Air to Air
Model 40A on Ground
Similar tones
View images with similar tones
Vintage United Air Lines Model 221 Monomail
The Boeing Monomail, designed initially to carry cargo and mail, was one of the most revolutionary airplanes in commercial aviation history. Two were built: the Model 200 mail plane and the Model 221 six-passenger transport. Both subsequently were revised for transcontinental passenger service and became Model 221As. The Monomail achieved major performance increases not by the addition of brute horsepower, but by structural and aerodynamic refinements. Air resistance was reduced by the Monomail's smooth, all-metal construction; cantilevered (that is, without struts), low-wing design; and the anti-drag cowling over the air-cooled Hornet engine. Retracting the wheels into the wing during flight further improved the mail plane's aerodynamics.
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Unique identifier
BI210532
Boeing ID
5006b
Type
Image
Size
6000px × 4800px 27MB
License type
RM
Keywords
1930s
airplanes
commercial
commercial airline livery
commercial passenger planes
day
exteriors
full body views
glare
ground shots
historic production status
mail planes
monoplanes
nobody
photos
propeller planes
right side views
scanned from film negative
shadows
sunshine
tarmac
text
unpainted
vintage / retro
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