[3] His daughter, Marija Strojnik Scholl, took interest in optics at an early age when she was accompanying her father to work, and went on to become a prominent astrophysicist.
He was imprisoned at the Gonars concentration camp during World War II along with thousands of other ethnic Slovenes by the Fascist Italian authorities of the Province of Ljubljana.
[6] Strojnik's pursuit of quality in science landed him on the wrong side of Slovenian academia, controlled after the war by the Yugoslav Partisans of Josip Broz Tito's postwar Communist government.
The S-4 "Laminar Magic" set a U.S. national aviation speed record in Fédération Aéronautique Internationale (FAI) Category C-1a/0 (European microlight, under 300 kilograms (660 lb) gross weight) in 1987.
[8] Strojnik also wrote a much earlier book entitled Človek je dobil krila ("Man Got His Wings") in Slovene, which was published in 1947.