 Further development of the Hs 130 as a reconnaissance aircraft continued with the Hs 130D, which was planned to have DB 605 engines and a complex two-stage supercharger, but was again unbuilt.The Hs 130E was a re-working of the Hs 130A with the "Höhen Zentrale (HZ)-Anlage " system in place of conventional superchargers.HZ-Anlage installed a third engine in the fuselage, a DB 605T, the only purpose of which was to power a large supercharger to supply air to the wing-mounted DB 603B engines.