Developments of the engine included the 003C, which raised thrust to — in the same thrust class as the competing Jumo 004B, but some 136 kg/300 lb lighter in weight; and the 003D, which raised it to nearly , which added one extra compressor stage beyond the seven of the earlier designs, and an extra turbine stage, with the thrust-weight ratio of 16.58 N/kg for the 003D at only in weight, being some 30% greater than the figure for the Heinkel HeS 011A.