• SINGLE SCREW DESIGN I de LUCE, DISCUSSION 

 O TWIN SCREW DESIGN J ON REFERENCE 44 

 O SERIES 60 PARENTS 

 D LIMITS OF SERIES 60 VARIATIONS 



Figure 22 — Comparison of Series 60 with 



L B 



U. S. Data, — and — 



B H 

















• SINGLE- SCREW OESIGtil "• '-""^*- 

 TWIN SCREW DESIGN i DISCUSSION 

 ^ ON REFERENCE 44 

 ^FOR MEAN "upturn" SPEED 



L - L,p FOR SINGLE SCREW SHIPS 

 L = L^,^FOR TWIN SCREW SHIPS 

 SERIES 60 PARENTS 

 D LIMITS OF SERIES 60 VARIATIONS 





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 1 



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f^ AT "UPTURN" SPEED 



Figure 23 - Comparison of Series 60 with U. S. Data, 



-j= and ^ — 5- 



y/L (L/100)^ 



V-18 



