The family of 4 Folding-Fin Aerial Rocket (FFAR) was the first type of rocket motors developed in the late 1940s.

The early FFAR rockets (with rocket motors Mk4 for aircraft and the Mk40 for helicopters) were conventional 70 mm diameter unguided rockets, comprising a solid-propellant motor with 4 folding fins and an appropriate warhead.

These were later replaced by the more performing rocket motors FZ67 (for fixed wings aircraft) and FZ68 (for helicopters).