 Development of the Hs 130 began with two Hs 128 prototypes, which first flew on 11 April 1939, with the second prototype flying on 20 February 1940.Both prototypes were research aircraft, used for testing pressurized cabins, engine superchargers, and cantilever wings.Different engines powered the two prototypes; the V1 by Daimler-Benz DB 601s and the V2 by Junkers Jumo 210s.