02/28/2009. Remarks by Johan Visschedijk: "During the German occupation (April 9, 1940 to May 5, 1945) the Danish company Skandinavisk Aero Industri (SAI) produced the ambulance plane KZ IV. Of all-wood construction the aircraft was initially powered by two 130 hp Gipsy Major I engines, later replaced by 145 hp Gipsy Majors. First flown at Kastrup on May 4, 1944, it was used by Zonen-Redningskorpset, a flying ambulance service. Flown by a two-men crew it could accommodate two patients on stretchers and two escorts.

In 1964 OY-DIZ was sold to the surveying company Aero-Kort at Dragor, this company donated the aircraft to the Dansk Veteranflysamling (Danish Vintage Aircraft Collection) at Stauning in early 1979. On the following May 26, the aircraft made an emergency landing at Kasted Mose (near Aarhus) and was badly damaged. During a restoration of 13 years the aircraft was into the original ambulance configuration and was flown again on June 5, 1992. It is still in airworthy condition.

A second example of the KZ IV (c/n 70) was first flown on January 10, 1949, registered as OY-DZU, presently it is preserved at Danmarks Tekniske Museum (Danish Technics Museum) at Helsingor."