| MB-4 | |
|---|---|
| |
| Role | Mail plane |
| National origin | United States of America |
| Manufacturer | Thomas-Morse Aircraft |
| First flight | 1920 |
| Number built | at least 2 |
| Developed from | Thomas-Morse MB-3 |
The Thomas-Morse MB-4 was a prototype American mailplane of the 1920s. It was of unusual design, being a biplane with twin fuselages housing the crew of two and a central nacelle which carried the aircraft's twin engines in a push-pull configuration.