Prototype Light Observation Helicopter for US Army competition. Lost to Hughes OH-6 Cayuse. Bell developed into civil 206 and the rest is history. 
List of Operators of D-250 / YHO-4 |
| Years | Model | Org | |
|---|---|---|---|
| 1968/20 | 206 |  US Army Aviation |
Global Distribution of D-250 / YHO-4 |
|
Construction Numbers |
| C/N | Year | History | |
|---|---|---|---|
| 4 | 1962 | 62-4202 | |
| 5 | 1962 | 62-4203 | |
| 6 | 1963 | 62-4204,N51HP,N532NA | |
| 7 | 1963 | 62-4205 | |
| 8 | 1963 | 62-4206 |
