525 



SEC. 12. APPLIED MECHANICS. 



2178ho. Four block Models of the "Hirsch" Ship 



(Patent) illustrating the " Hirsch" principles of shipbuilding. 



Hermann Hirsch. 



The SS. " Paun-ting " was built on Mr. Hirsch's principle, by Messrs. John 

 Elder & Co. for Paul S. Forbes, Esq., New York, in 1873. 



Dimensions of SS. " Paun-ting." 

 Length between perpendiculars, 210 feet. 

 Breadth, moulded, 33 feet. 

 Depth, moulded, 22 feet 9 inches. 



Draught on trial, 12' 8" forward, 13" 9" aft, 13 feet 2| inches. 

 Displacement, 1,520 tons. 

 Mid-area, 392 2 feet. 

 Immersed surface, 12,344 feet. 

 Area of immersed midship section, 5,239 feet. 

 Displacement per inch, 12-4 tons. 

 Co-efficient of displacement, '568. 

 Weight of hull and machinery, 790 tons. 

 Weights on board, 730 tons. 

 Maximum of Ind. H.P. 800. 



Result. 



Speed 11 knots. 



Displacement co-efficient of performance, 220. 

 Mid-area co-efficient of performance, 652. 



The Hirsch Ship (Patent). 

 CALCULATIONS and PRINCIPAL DIMENSIONS of SHIPS as per Models. 





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