▁supplied ▁as ▁a ▁k it ▁or ▁as ▁plans ▁for ▁amateur ▁construction . ▁ ▁Since ▁the ▁w inding ▁up ▁of ▁business ▁by ▁Fal con ar ▁A via ▁in ▁ 2 0 1 9 , ▁the ▁plans ▁are ▁now ▁sold ▁by ▁Mann a ▁A viation . ▁ ▁Design ▁and ▁development ▁In ▁ 1 9 6 3 ▁Fal con ar ▁partner ed ▁with ▁designer ▁Marcel ▁Jur ca ▁to ▁produce ▁the ▁Jur ca ▁G nats um . ▁By ▁ 1 9 6 7 , ▁Fal con ar ▁recommended ▁a ▁large ▁number ▁of ▁changes ▁to ▁the ▁design , ▁which ▁resulted ▁in ▁Jur ca ▁leaving ▁the ▁project . ▁The ▁modified ▁aircraft ▁was ▁developed ▁as ▁the ▁S AL ▁Must ang ▁and ▁first ▁flow n ▁in ▁ 1 9 7 1 ▁after ▁significant ▁cost ▁over run s . ▁Fal con ar ▁A ircraft ▁Ltd ▁was ▁sold ▁to ▁George ▁F . ▁Ch ivers ▁and ▁other ▁invest ors , ▁and ▁operated ▁as ▁St ur geon ▁Air ▁Ltd ▁( S AL ) ▁with ▁Fal con ar ▁as ▁an ▁employee ▁until ▁ 1 9 7 3 . ▁ ▁The ▁S AL ▁Must ang ▁features ▁a ▁cant ile ver ▁low - wing , ▁a ▁single - se at , ▁or ▁option ally ▁a ▁two - se ats - in - tan dem , ▁en closed ▁co ck pit ▁under ▁a ▁b ubble ▁can opy , ▁ret ract able ▁conventional ▁landing ▁g ear , ▁including ▁a ▁manually ▁ret ract able ▁tail w heel ▁and ▁a ▁single ▁engine ▁in ▁tra ctor ▁configuration . ▁ ▁The ▁aircraft ▁is ▁made