URMV-3 IS-4

IS-4
Role Sailplane
National origin Romania
Manufacturer URMV-3
Designer Iosif Şilimon
First flight 5 June 1959
Developed from URMV-3 IS-3d

The IS-4 was a high performance glider designed by Iosif Şilimon and built in Romania in the late 1950s at the URMV-3 (Rom: Uzinele de Reparatii Material Volant-3 - Glider repair and manufacture factory) factory at Braşov.