Chizhevski BOK-1
| BOK-1 | |
|---|---|
| Role | High-Altitude research aircraft |
| National origin | Soviet Union |
| Designer | Vladimir Chizhevsky |
| First flight | summer 1936 |
| Number built | 1 |
| Developed from | Tupolev RD |
The BOK-1 (Byuro Osobykh Konstrooktsiy - bureau of special design), (a.k.a. SS (Stratosfernii Samolyet – stratospheric aircraft)), was an experimental high-altitude aircraft designed and built in the USSR from 1934.