IS-4 Jastrząb
The IS-4 Jastrząb (Instytut Szybownictwa – gliding institute) was a single-seat aerobatic glider designed and built in Poland from 1949.
| IS-4 Jastrząb | |
|---|---|
| Role | Glider |
| National origin | Poland |
| Manufacturer | Instytut Szybownictwa |
| Designer | J Niespał |
| First flight | 21 Dec 1949 |
| Introduction | 1950 |
| Number built | 37 |
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