Homebuilt RB-4 registrations
1 Homebuilt RB-4 aircraft on the FAA register (FAA model RB-4), newest first.
| N-number | Year | Aircraft |
|---|---|---|
| N6890R | 1990 | Homebuilt RB-4 |
Source: FAA Aircraft Registry, October 2026. Each N-number links to its aircraft page with registration record, history and accident data.
