Travel Air 4000
| Model 4000 | |
|---|---|
| Travel Air B-4000, registration NC174V | |
| Role | General aviation |
| National origin | United States |
| Manufacturer | Travel Air |
| First flight | 1927 |
| Number built | c.100 |
| Developed from | Travel Air Model B |
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The Travel Air 4000 is an American general-purpose biplane of the 1920s, a member of the family of aircraft that began with the Travel Air Model A. It was later known as the Model 4. Derived from the Model BW, around 100 were built, including two that were converted from Model 2000s.