The IIL IS-9 was a low powered, experimental pod and boom style motor glider, designed and built in Romania in the late 1950s.
From about 1950 to his death in February 1981, Iosif Silimon was Romania's most prominent glider designer, his aircraft distinguished by his initials.
Its single-seat cockpit was ahead of the wing leading edge, enclosed by a smoothly contoured, two-piece, side-opening perspex canopy.
The pod ended abruptly under the trailing edge, with a 15 kW (20 hp) engine of unknown make in the rear driving a small-diameter, two-blade propeller.
The fin also mounted a straight edged, ply-covered tailplane placed just above the boom which carried rounded elevators, mass balanced by a bob weight inside the fuselage, with gaps at their roots to clear the fin and a small cutout for rudder movement; the elevators were fabric-covered-over-ply skins like the ailerons and had a starboard-side trim tab.