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Conceptually similar
DH-4Bs Being Remodeled
DH-4 Assembly
DH-4 Frame
Model 16, DH-4 Manufacturing
Haviland DH-4 Rebuilding, Boeing Shop Floor
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DH-4 on Ground
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DH-4 on Ground
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DH-4B Steel Fuselage Static Test
Boeing gained valuable early experience in metal structures in the 1920s by rebuilding surplus de Havilland DH-4s, replacing their wire-braced wooden fuselages with welded steel tubing. From 1923 to 1925, 186 airplanes were rebuilt using the Boeing-developed arc welding process for steel-tube fuselages. These aircraft were designated DH-4M (for modernized). The arc welding process later was crucial development of the first Boeing-designed fighters.
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Unique identifier
BI211198
Boeing ID
407b
Type
Image
Size
5100px × 3950px 19MB
License type
RM
Keywords
1920s
adults
airplanes
biplanes
bombers
day
factories
factory workers
full body views
fuselages
grid patterns
ground shots
hangars
historic production status
interiors
left side views
male
manufacturing
military
military observation aircraft
Non Boeing products
photos
propeller planes
structural systems
testing
text
three people
trainers
vintage / retro
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