"At his stall at this year’s Monaco Yacht Show, Rob Humphrey presented the plan of a SkySails super yacht. The design has been specially developed with the features of the SkySails-System in mind, to maximise the advantages the system offers. The yacht is a 40 metres long Trimaran which can attain speeds of up to 20 knots using the SkySails propulsion alone - without support from the main engine - provided that suitable winds are present."
http://www.skysails.info/fileadmin/u..._Humphreys.pdf