Category:Douglas O-31
US military observation aircraft introduced 1930  | |||||
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Media in category "Douglas O-31"
This category contains only the following file.
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Douglas XO-31.jpg 550 × 428; 43 KB
Categories:
- Douglas military aircraft
- Military aircraft with 1 piston engine
- Aircraft of the United States Army Air Corps
- Reconnaissance aircraft of United States origin
- 1930s aircraft
- Aircraft of the United States Army Air Forces
- Parasol wing aircraft
- Observation aircraft of the United States
- Aircraft by designation
- Aircraft numbered 31
- Aircraft by United States Army Air Service designation