Ikarus 451 - research aircraft

Ikarus 451 - Wikipedia

Flight of the Yugoslav Ikarus – Part I – Aces Flying High

Yugoslav Tree Proposal Part 2/2: Air Force (info in comments) : r/Warthunder

Ikarus 451 - Wikipedia

Ikarus S-451, prone pilot experimental. : r/WeirdWings

Ikarus 451 - Yugoslavian Research Aircraft series. This one focused on prone pilot operations. : r/WeirdWings

Triglav Model TB-3001 Yugoslav IKARUS S-451M Zolja Aircraft 1/48 Scale, Limited Edition Resin Kit : : Toys & Games

Flight of the Yugoslav Ikarus – Part II – Aces Flying High

Flight of the Yugoslav Ikarus – Part I – Aces Flying High