 The Messerschmitt Bf 109E-7 corrected this deficiency by adding a ventral center-line ordnance rack to take either an SC 250 bomb for "Jabo" duties, or a standard 300 litre (66 Imp.gal/80 US gallon) capacity Luftwaffe drop tank to double the range to 1,325 km (820 mi).The ordnance rack was not retrofitted to earlier Bf 109Es until October 1940.