Table C-27. Hydrostatic Test Data for Nominal 4.00-Inch (D;) -6.00-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 131 - 135 



(Sealed with grease 



radio! c 



ea ranee 



3.005 to 0.010 inch 



; nomina 



Dq/D; ratio 1.5) 





Parameter 



Specimen Number 



Value 



131 



132 



133 



134 



135 



Max 



Avg 



Min 



Thickness (in.) 



0.957 



0.972 



0.957 



0.976 



0.963 



0.976 



0.965 



0.957 



Dq (actual, in.) 



5.986 



5.981 



5.984 



5.980 



5.985 



5.986 



5.984 



5.980 



Temperature (°F) 



64 



65 



65 



65 



66 



66 



65 



64 



t/D, Ratio (actual) 



0.239 



0.243 



0.239 



0.244 



0.241 



0.244 



0.241 



0.239 



Pressurization Rate (psi/min) 



651 



725 



652 



685 



698 



725 



682 



651 



Pressure (psi) 



Axial D 



isplaceme 



nt of Cer 



ter Point 



on Window's Low- 



Pressure F 



ace (in.) 



500 



0.009 



0.002 



0.006 



0.014 



0.030 



0.030 



0.012 



0.002 



1,000 



0.023 



0.016 



0.019 



0.026 



0.044 



0.044 



0.026 



0.016 



1,500 



0.036 



0.034 



0.031 



0.051 



0.057 



0.057 



0.042 



0.031 



2,000 



0.048 



0.047 



0.042 



0.062 



0.063 



0.063 



0.052 



0.042 



2,500 



0.060 



0.058 



0.057 



0.076 



0.078 



0.078 



0.066 



0.057 



3,000 



0.105 





0.070 



0.091 



0.092 



0.105 



0.090 



0.070 



3,500 



0.137 









0.106 









Displacement at Failure (in.) 





0.068 



0.150 



0.101 



0.106 



0.150 



0.106 



0.068 



Pressure at Failure (psi) 



3,550 



2,900 



3,100 



3,800 



3,500 



3,800 



3,370 



2,900 



Notes: 



1. 50-psi preload. 



2. Audible cracking at about 2,500 psi. 



75 



