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DH-4Bs Being Remodeled
DH-4Bs Being Remodeled 
Haviland DH-4 Rebuilding, Boeing Shop Floor
Haviland DH-4 Rebuilding, Boeing Shop Floor 
Model 16, DH-4 Manufacturing
Model 16, DH-4 Manufacturing 
DH-4 Frame
DH-4 Frame 
DH-4B Steel Fuselage Static Test
DH-4B Steel Fuselage Static Test 
DH-4 on Tarmac
DH-4 on Tarmac 
DH-4 on Ground
DH-4 on Ground 
DH-4 on Ground
DH-4 on Ground 
PW-9 and DH-4 on Field
PW-9 and DH-4 on Field 
North American Fokker First Production DH-4M-2 Takeoff
North American Fokker First Production DH-4M-2 Takeoff 
Partial Assembly, F3B-1
Partial Assembly, F3B-1 
Boeing Factory Workers Sewing a MB-3A Wing
Boeing Factory Workers Sewing a MB-3A Wing 
MB-3A Propeller Construction
MB-3A Propeller Construction 
Transporting the MB-3A
Transporting the MB-3A 
Assembly Uncovered, Design #74
Assembly Uncovered, Design #74 
F4B-4 50. Caliber Gun Installation
F4B-4 50. Caliber Gun Installation 
F4B-2 Right Side Gun Installation
F4B-2 Right Side Gun Installation 
Empennage Assembly, F3B-1
Empennage Assembly, F3B-1 
Model 80A Wings and Frame Assembly
Model 80A Wings and Frame Assembly 
Women Prepare to Cover FB-5 Fuselage
Women Prepare to Cover FB-5 Fuselage 
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DH-4 Assembly

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 BI211200 
Boeing ID 425b 
Type Image 
Size 5100px × 3950px   19MB 
License type RM 
Keywords
1920s
adults
airplanes
biplanes
bombers
businesspeople
day
factories
factory workers
fuselages
grid patterns
ground shots
hangars
historic production status
interiors
male
manufacturing
military
military observation aircraft
Non Boeing products
perspective lines
photos
propeller planes
right rear views
right side views
structural systems
trainers
two people
vintage / retro
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