216 THE PROPELLING MACHINERY OF THE U. S. S. LEVIATHAN. 



Dimensions of Leviathan and Other Large Vessels. 



Leviathan 



Imperator 



Aquitania 



Mauretania 



Builders 



Owners . 



Blohm & Voss, 

 Hamburg 



U. S. Government 



Date of completion 



Length overall 



Length between perpendiculars 



Breadth 



Depth, moulded 



Gross tonnage 



Draught 



Displacement 



Type of engine 



1914 

 950 ft. 



Number of shafts 



Type of boilers 



Number of boilers 



Number of furnaces 



Steam pressure 



Total heating surface 



Total grate surface 



System of forced draught. . . . 

 Total S. H. P. of ahead turbines 



Speed in service 



Revolutions per minute 



100 ft. 

 63 ft. 



54, 190 



38.50 ft. 



63, 100 tons 



Parsons 

 turbines 



4 



Water-tube 



46 



138 



235 lbs. persq. inch 



210, 440 sq. ft. 



3, 843 sq. ft. 



Howdens 



65, 000 



22.50 knots 



170 



Vulcan Co., 

 Hamburg 



British Ministry 

 of shipping 



1913 



905 ft. 



880 ft. 



98 ft. 



62 ft. 



52, 117 



35.50 ft. 



67, 000 tons 



Curtis Parsons 

 turbines 



4 



Water- tube 



46 



138 



235 lbs. persq. inch 



203, 009 sq. ft. 



3, 763 sq. ft. 



Howdens 



61, 000 



22.50 knots 



170 



John Brown & 



Company, 



Clydebank, 



Scotland 



Cunard 



1914 



901.50 ft. 



865 ft. 



97 ft. 



64 ft. 



46, 500 



36 ft. 



53, GOO tons 



Parsons 

 turbines 



4 



Scotch double-ended 



21 



168 



195 lbs. per sq. inch 



138, 595 sq. ft. 



3, 541 sq. ft. 



Howdens 



60, 000 



23.50 knots 



165 



Swan, Hunter & Wigham 



Richardson, 



Wallsend on Tyne, 



England 



Cunard 



1907 



765 ft. 



760 ft. 



88 ft. 



60.33 ft. 



32, 000 



33.50 ft. 



38, 000 tons 



Parsons 

 turbines 



4 



Scotch double-ended 



21 D. E. 2 8. E. 



192 



195 lbs. per sq. inch 



158, 350 sq. ft. 



4,048 sq. ft. 



Howdens 



68, 000 



25 knots 



180 



general arrangement of TURBINE MACHINERY. 



The vessel is driven by the Parsons direct drive type of steam turbine arranged 

 on four shafts, and the turbine installation consists of eight separate turbines with 

 their respective rotors. 



The go-ahead units, of which there are four, each driving a separate shaft, are 

 arranged to operate in triple series, which is the arrangement adopted in all the 

 large Parsons turbine-driven vessels built after the completion of the Cunard liners 

 Lusitania and Mauretania in 1907. 



The go-astern units, of which there are also tour, are arranged to operate in 

 parallel and consist of two independent sets for the two port and two starboard 



