Two further modified Hs 130A-0s was produced under the designation "'Hs 130A-0 / U6 "'and featured a greater wingspan, DB 605B engines, Hirth superchargers, GM-1 nitrous oxide power boosting, and under-wing drop tanks, and being ready for flight testing in November 1943, demonstrating an absolute ceiling of 15, 500 m ( 50, 570 ft ).
