98 LAUNCHING DATA FOR A BATTLESHIP. 



PRINCIPAL DIMENSIONS, ETC. 



Length between perpendiculars 575 ft. o ins. 



Breadth on load waterline 95 ft. 2>4 ins. 



Mean draught 28 ft. 6 ins. 



Displacement 27,500 tons 



Percentage completion at time of launch 61% 



Weights worked into vessel, tons ii>765 



Temporary weights on board, tons 85 



Men, tools, and dunnage, tons 115 



Launching cradle, tons 47° 



Total launching weight 12,435 tons 



Draught after launching, forward 13 ft. 7 ins. 



Draught after launching, aft 16 ft. 4 ins. 



BUILDING SLIP, LAUNCHING WAYS, CRADLE, ETC. 



Declivity of building slip, per foot 11/16 in. 



Declivity of keel blocks, per foot 1 1/16 m. 



Length of ground ways over all 644 ft. 



Length of ground ways submerged 167 ft. 



Width of ground ways (each) 60 ins. 



Thickness of ground ways 16 ms. 



Declivity of ground ways, per foot 1 1/16 m. 



Camber of ground ways None. 



Inclination of ground ways, transverse, per foot ^ in. 



Spread of ground ways, center to center 28 ft. 6 ins. 



Material of ground ways Yellow pine faced with oak 



Length of sliding ways over all 473 ft. 



Length of sliding ways, effective 465 ft. 



Thickness of sliding ways 15 ins. 



Maximum width of sliding ways 5^/^ ins. 



Effective width of sliding ways 57 '^^^■ 



Bearing area 4,420 sq. ft. 



Material of sliding ways Yellow pine faced with oak 



Length over which poppets distribute pivoting pressure ... 23 ft. 



Area under poppets to take pivoting pressure 220 sq. ft. 



Projected length of curved bearing surface under fore 



poppets 21 ft. 9 ins. 



Projected area of trunnion segment to take pivoting pres- 

 sure 208 sq. ft. 



Number of wedges, spaced 17- inch centers 590 



Wedges, oak, 9 feet by 6y^ inches, tapered 5^ inch per foot. 



After end of sliding ways at start, up from water's edge ... 6 ft. 



