Figure 3a - View of Starboard Side at Bow which Shows 

 Flow Lines Passing Over the Bilge 



Figure 3b - View of Starboard Side Forward of Amidships 



Figure 3 - Flow Lines Determined by Hydrogen Sulphide-White Lead 

 Technique for Orientation of Hot -Wire Probes 



The model was first towed with all probes in place but only the out- 

 puts of the wires in the first column were recorded, since the flow over the 

 wires aft of these was found to be affected by the turbulent wake of the for- 

 ward probes. After running through the complete schedule of speeds, the lead- 

 ing 3 wires were removed, the wires in the next column were connected to the 

 recording circuit, and the schedule of conditions repeated. This process was 

 continued until a station was reached where all the wires showed turbulent flow 

 at the lowest speed of interest, 0.5 knot. 



