TABLE 1 

 Model - Full-Scale Relationships 



Item 



Displacement 



Speed 



Towpo'int position 

 forward of stern 



Initial trim 



Cable length 



Model 



Pull Scale 



21 7 pounds 



75,000 pounds 



28.9 



100,000 



36.2 



125,000 



43.4 



150,000 



1.29 knots 



5 knots 



2.58 



10 



3.87 



15 



5.16 



20 



6.45 



25 



7.75 



30 



9,04 



35 



15.49 



60 



17.5 inches 



21.9 feet 



19o2 



24.0 



20.5 



25.6 



22.4 



28.0 



24.0 



30.0 



25.6 



32.0 



28.8 



36.0 



33.6 



42.0 



0.29 inches by bow 



0.36 feet by bow 



1.68 



2.10 



3.35 



4.19 



0.50 inches by stern 



0.63 feet by stern 



1.01 



1.26 



1.26 



1.58 



1.34 



1.68 



1.76 



2.20 



2.26 



2.83 



300 feet 



1500 yards 



400 



2000 



500 



2500 



Linear ratio ship to model, X = 15 

 Speed ratio, X 1 / 2 = 3 * 87 

 Displacement ratio, 1.024 \ 3 = 3456 



