t stasr 



8'-3"WL- 



Trl03^ 



Mom Condenser 

 Overboord Discharge 



4 Lip 



i 



Tr99^ 



lO'-O" Buttock 



1^ Stations 



NOTES: 



Blkd94 1- Pilot-static tubes at Stations V and VI extend up to 24 in. ftoii liull. 



2. nanometer board tor Stations V and V| located in forward engineroon. 



3. Angles given are lliose measured after installalion ol pilot lubes. 



4. 4-tn. Iipon overboard dlscb-iiQe. 



5. Reference: EuShips PInn Mos. [)f"S22-SE700-243fi25 

 and nO828-S1101-510261. 



I I I . I . I . I 

 12 3 4 

 Scale in feet 



(^ Stom- 



Overboard 

 Discharge 



TrSS:: 



-2-6 



■1 

 J-1 



IStoY 



TrSly 



J I 



FrIOO 

 Starboard Elevation, Looking to Port 



Blkd94 



-Baseline- 



(^ Stotionll 



^ Station! 



lO'-O" Buttock - 



Section of Bulkhead 94, Looking Aft 

 Figure 4 — Pitot-Tube Locations in Forward Engineroom 



At Station IV, where the Prandtl tube was located in the throat of the condenser scoop, 

 velocity measurements were obtained along a single vertical line approximating the centerline 

 of the throat, as shown in Figure 3. Additional instrumentation for the condenser, shown in 

 Figure 5, consisted of manometers measuring static pressures and pressure differences in the 

 main circulating system. The manometers for the circulating system were read visually by 

 observers in the engineroom. 



BOUNDARY-LAYER SURVEY 



OBSERVED RESULTS 



The observed data are given in Table 1. Each data point represents the average results 

 of four to eight pictures taken at intervals during a run. The manometer deflections used in 

 computing u were the average values from the photographs corrected for parallax. This 

 correction did not exceed ± 0.03 inch. The average results compare favorably with the results 

 of observers as recorded in the trial log books. 



For the 5- and 10-knot speeds, readings were obtained from both the mercury and 

 tetrabromethane manometers. These results usually agree within 0.1 knot. An estimate of the 

 reproducibility of the results can be obtained by comparing the data for the two series of runs 



