 Three prototype aircraft Hs 130 As were built, the first flying on 23 May 1940.Five pre-production Hs 130A-0's followed, being delivered in early 1941, and featured DB 601R engines – each with a single-stage supercharger, retractable landing gear, and a bay in the rear to house two Rb75/30 cameras for reconnaissance.The five Hs 130A-0s subsequently underwent trials and testing, which revealed significant problems with the aircraft performance, and reliability problems which prevented operational use.