February 7, 2017 (Persian calendar 1395/11/19) .:: This is a historical documentary video ::. Iran Converts Regular Bombs to Retarded bombs تبدیل بمب های معمولی به بمب های تاخیری ایران The retarded bomb uses a mechanical method of creating increased aerodynamic drag, such as a parachute, ballute, or drag-inducing petals. These deploy after the ordnance is released, slowing its fall and abbreviating its forward trajectory, giving the aircraft time to get clear of the blast zone when bombing from low alti