"The largest (to date) propeller is built by the German company Mecklenburger Metallguss GmbH:
"Weighing in at 131 tons, the - to date – largest ship propeller made in Waren on the Müritz River drives the Emma Maersk, the world’s largest container ship, with a load capacity of up to 14,770 twenty-foot containers, a length of 397 m, a width exceeding 56 m and a height of 68 m... Together, engine and propeller allow the oceangoing giant to cruise at speeds of 27 knots (50 km/h).""
via darkroastedblend.com
