INSTRUMENTATION 



The velocity and direction of flow in the-boundary layer of the destroyer were measured 

 with the specially designed -pitoi^ static* tubes shown in Figure 1. These pitot tubes were 

 installed at five stations near the scoop and overboard discharge, as shown in Figures 2, 3, 



I3'-0"DWL- 



Figure 1 - Pitot Tube for TIMMERMAN Boundary-Layer Survey 



7 



Aft Engine Room-, Fwd Engine Room -j ^Bulkhead 94 



Aft Fire 

 Room 



Fwd Fire 



■ Length between Perpendiculars = 383 ft - 2l" Frame Spacing 



_] I L_ 



_1 I I I L. 



200 



J I I L 



_l I I \ l_ 



150 



110 no 100 



A F 



feet 



J I \ LLUJ 



-I3'-0"DWL 



Figure 2 - Inboard Profile of USS TIMMERMAN 



♦The term pitot tube will be used throughout the remainder of this report in place of the more precise 

 pitot-static tube. 



