Curtiss O-40 Raven
| O-40 Raven | |
|---|---|
| The original prototype YO-40 | |
| Role | Observation aircraft | 
| National origin | United States of America | 
| Manufacturer | Curtiss-Wright | 
| First flight | 1932 | 
| Introduction | 1933 | 
| Retired | 1939 | 
| Primary user | United States Army Air Corps | 
| Number built | 5 | 
The Curtiss O-40 Raven was an American observation aircraft of the 1930s which was built and used in small numbers. A single example of the YO-40, a single-engined Sesquiplane with a retractable undercarriage was built, followed by four examples of a modified monoplane version, the O-40B, which remained in use until 1939.