-15- 



Typical example of a computation. 



Model 4029 - TMB-Design Target 



., , -. . „ 0.54 fps- )_£5.3 fps, full scale) 



Model speed, V =(3.87 knots)' 0-5. knots, full scale) 



Model resistance, R m - 5.60 pounds 



Wetted length = 3.00 feet 



Wetted area = 5.65 feet 2 



Applied cable load, S - 5.00 pounds 



Mass density of sea water P /0 _ ^ n <->c 1°» sec? 

 — — Sg , '/d - 0.995 — gr 4 — 



Mass density of basin water f/2~ o 968 ~^°* sec. 2 

 Cable diameter, d = 0.0833 feet 



Basin water temperature - 70 degrees Fahrenheit 

 Sea water temperature = 50 degrees Fahrenheit 



1) Determine D from model data by the Schoenherr 

 friction formulation: D - 18p00 



2) Tan = |^°_ = 0.893; = 41.8 degrees 



3) From Figure 32, £ = 2.16 



4) L - 8320 feet 



5) F - 1.70 pounds/foot 



6) T - 14,100 pounds 



7) R = 85.0 pounds/foot 



8) w - 0.0210 



9) cosoC- 0.990 



10) sec = 1.34 



11) D-t = (D sec * T) cos 



= Ql8, 000) (1.34) + 14, 100 ] 0.990 

 = 37,800 



