In July 1944, Hans Kammler ordered the North Works ("Nordwerke") to use cross-tunnels 1–20 for a Junkers jet and piston engine factory, leaving cross-tunnels 21–46 for Mittelwerk GmbH. During February–April 1945, the Nordhausen plant built Taifun anti-aircraft missiles and Heinkel He 162 jet fighters and put into operation a liquid oxygen plant. The plant was the "Eber" project and used equipment evacuated from the Watten bunker and elsewhere to build Heylandt liquid oxygen generators; the 15 generators were nearly complete when the site was captured. The Mittelwerk also contained equipment for producing jet fuel, and in an emergency 1944 decentralization program (named "Geilenbergprogramm" after Edmund Geilenberg) started the "Cuckoo" project, an underground oil plant to be "carved out of the Himmelsburg" North of the Mittelwerk.