c/n Unknown ---- Select Soko Model----GazelleWhirlwind--- Other Models ---Helicopter Soko Whirlwind Serial unknown Register 11728 used by Ratno Vazdhuhoplovstvo i Protiv Vazdusna (socialist federal republic Yugoslav air force). Aircraft history and location History Help Us IDNew Layout 11728 Ratno Vazdhuhoplovstvo i Protiv Vazdusna Soko S-55-5, c/n ???, ff:? del Yugoslav Air Force as 11728, unk. @ (optional) Send