larger window was fabricated for the test of Configuration B. Through 

 holes simulating cable penetrations and half-through holes simulating bolt 

 holes were also machined in Configuration B, as shown in Figure 3. The 

 cable penetrations and the half-through holes were drilled parallel with the 

 through holes directed to the center of the 11. 373 radius of the concave 

 model surface (Fig. 1). 



The cable penetrations were sealed with plugs having 0. 005" clearance 

 with the hole walls and specially nnade "O" rings (Fig, 4). Since strain 

 gages were installed at the edge of the holes, the plugs were welded to 

 brackets which overspanned the holes. The ends of the bracket legs were 

 ground to fit the contour of the model, and the "O" rings were located at the 

 half-thickness of the shell wall with the plugs in place. 



