Motor grab hopper dredger Samuel Armstrong built by Henry Robb for Ipswich Dock Commission service; length oa 135 ft, breadth molded 28 ft 6 in., depth molded 12 ft; hopper capacity is 300 cu yd on mean draught of 10 ft 6 in.; Priestman diesel crane is designed for grabbing radius of 30 ft and is capable of working to depth of 50 ft below water level; one 70 cu ft mud grab and one 55-cu ft sand grab is provided; Crossley engine develops 700 bhp at 350 rpm.
Hopper dredger for Ipswich
Shipbldg Shipg Rec
Shipbuilding and Shipping Record ; 86 , n 8
1955
Article (Journal)
English
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