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| Me109 circa 1945, found at:http://www.luftwaffephotos.com/lme10993.htm |
Found this interesting article about how whilst Hungary was subject to Allied bombing in the Second World War, fuselages and engines for Me109's were manufactured underground in a secret factory.
http://gizmodo.com/the-caves-that-held-a-secret-hungarian-aircraft-factory-1741803956
The tunnels were estimated at being 35km long, providing 180 square kilometres of space, lucky for us most aircraft factories were above ground eh?
