Origins and Design
In the mid-1950s, engineers Mirko Josifović and Jovan Čubrilo, from the aviation department of the Faculty of Mechanical Engineering at Belgrade University, began designing a light sport aircraft, the BS-1 (also known as “Belgrade Student”). The Akademiski Aeroklub “Beograd” (AAK) undertook the construction of the machine.
Maiden Flight and Technical Specifications
The first flight of the BS-1, with registration number YU-CKK, took place on March 28, 1958. This was a single-seat, cantilever low-wing monoplane, powered by an Italian CNA D4 engine delivering 62 hp (45.6 kW) and featuring a two-bladed wooden propeller.
Evaluation and Legacy
During testing, the BS-1 Student proved easy to operate and demonstrated good flight characteristics. However, the aircraft did not enter series production due to a lack of interest from the Yugoslav civil aviation leadership. The sole “Student” airframe was ultimately transferred for display at the Belgrade Aviation Museum (Muzej vazduhoplovstva).
Technical Specifications
| Modification | BS -1 |
| Wingspan, m | 8. 45 |
| Aircraft length, m | 6. 26 |
| Wing area, m2 | 11.08 |
| Empty weight | 300 |
| Maximum takeoff weight | 450 |
| Engine type | 1 Piston engine CNA D4 |
| Power, hp | 1 x 62 |
| Maximum speed, km/h | 200 |
| Cruising speed, km/h | 173 |
| Crew | 1 |
Image and diagram gallery of the BS-1 Student
 BS-1 Student |
 BS-1 Student |