1.6 and 2 for i/f m /'^ m and z m /r m are not unusual for other vessels, it appears that the values 

 recorded here are by no means excessive. 



Throughout the tests in head seas, the bow was dry except for an occasional bit of 

 splashing; the stern shipped water only in the steepest waves— i.e., k/h = 20— of lengths 

 k = 0.75L, 1.0L and 1.2L. 



The model rode easily and was dry in following seas at speeds of 6 and 12 knots. When 

 lying to, she took water at the stern in seas of k = 0.75L, k/h = 20, and also k = 1.0L, \/h = 25 

 and steeper, and was dry otherwise. 



TABLE 2 

 Tabulation of Test Results 



A 

 ft 



h 

 ft 



k/h 



deg 



ft 



Speed 

 knots 



z J T m 



+J*m 



Tow Force 



127.5 

 127.5 

 127.5 



6.30 

 4.31 

 3.25 



20.24 

 29.22 

 39.20 



2.85 

 2.07 

 1.55 



1.45 

 1.04 

 1.28 





 

 



0.284 

 0.339 

 0.316 



0.321 

 0.336 

 0.337 



Zero 



127.5 

 127.5 



4.30 

 3.17 



29.60 

 40.20 



2.40 

 2.95 



1.40 

 1.48 



1.59 

 2.45 



0.598 

 0.915 



0.395 

 0.658 



6 knots 

 Stillwater 



127.5 

 127.5 

 127.5 



6.52 

 4.36 

 3.19 



19.60 

 29.20 

 40.00 



1.33 

 0.73 

 1.55 



0.67 

 0.37 

 0.78 



9.52 

 10.70 

 11.25 



0.310 

 0.417 

 0.420 



0.145 

 0.119 

 0.344 



12 knots 

 Stillwater 



170 

 170 

 170 



8.36 

 5.46 

 4.02 



20.6 

 30.1 

 42.2 



4.80 

 3.55 

 2.50 



2.01 

 1.78 

 1.14 





 

 



0.482 

 0.574 

 0.568 



0.549 

 0.594 

 0.586 



Zero 



170 



4.19 



40.5 



3.67 



2.69 



2.92 



1.280 



0.826 



6 knots 

 Stillwater 



170 

 170 

 170 



8.66 

 5.78 

 4.26 



19.6 

 29.4 

 39.9 



4.45 

 4.90 

 3.02 



4.34 

 3.21 

 2.07 



2.97 

 5.54 

 8.74 



1.000 

 1.183 

 0.972 



0.485 

 0.800 

 0.670 



12 knots 

 Stillwater 



204 

 204 

 204 



10.20 

 6.97 

 5.36 



20.00 

 29.30 

 38.90 



5.40 

 4.15 

 2,80 



3.95 

 2.87 

 1.59 





 

 



0.772 

 0.824 

 0.595 



0.600 

 0.676 

 0.605 



Zero 



204 

 204 



6.86 

 5.13 



29.75 

 39.80 



5.35 

 3.67 



2.85 

 2.69 



2.075 

 2.860 



0.833 

 1.050 



0.884 

 0.812 



6 knots 

 Stillwater 



204 

 204 

 204 



10.30 

 6.77 

 5.10 



19.78 

 30.10 

 40.20 



9.30 

 6.55 

 5.00 



4.99 

 4.54 

 3.00 



3.830 

 6.120 

 7.580 



0.969 

 1.195 

 1.177 



1.020 

 1.095 

 1.117 



12 knots 

 Stillwater 



340 

 340 

 340 



16.90 

 11.24 

 8.50 



20.05 

 30.20 

 40.00 



9.35 

 5.70 

 4.42 



8.78 

 5.25 

 3.70 





 

 



1.040 

 0.934 

 0.871 



1.065 

 0.956 

 0.982 



Zero 



340 



8.59 



39.94 



4.30 



4.56 



3.17 



1.063 



0.954 



6 knots 

 Stillwater 



340 

 340 

 340 



17.30 

 11.33 

 8.75 



19.67 

 30.00 

 38.90 



8.50 

 6.49 

 4.55 



8.59 

 5.56 

 5.70 



7.49 

 8.96 

 9.74 



0.925 

 0.982 

 1.290 



0.928 

 1.083 

 0.983 



12 knots 

 Stillwater 



