Table C-26. Hydrostatic Test Data for Nominal 4.00-lnch (Dj) -6.00-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 126- 130 



(Sealed with grease; radial clearance 0.005 to 0.010 inch; nominal D^/D- ratio 1.5) 



Parameter 



Specimen Number 



Value 



126 



127 



128 



129 



130 



Max 



Avg 



Min 



Thickness (in.) 



0.451 



0.484 



0.460 



0.463 



0.460 



0.484 



0.464 



0.451 



Dq (actual, in.) 



5.988 



5.984 



5.989 



5.990 



5.987 



5.990 



5.988 



5.984 



Temperature (^F) 



68 



68 



68 



68 



65 



68 



67 



65 



t/D| Ratio (actual) 



0.106 



0.121 



0.108 



0.108 



0.107 



0.121 



0.110 



0.106 



Pressurization Rate (psi/min) 



689 



657 



638 



669 



737 



737 



678 



637 



Pressure (psi) 



Axial D 



splacement of Cen 



ter Point 



on Window's Low- 



Pressure 1 



ace (in.) 



100 









0.022 



0.017 









200 



0.015 



0.010 



0.028 



0.028 



0.027 



0.028 



0.022 



0.010 



300 



0.029 







0.038 



0.034 









400 



0.038 



0.032 



0.050 



0.048 



0.044 



0.050 



0.042 



0.032 



500 



0.049 







0.058 



0.060 









600 



0.060 



0.053 



0.075 



0.070 



0.073 



0.075 



0.068 



0.053 



700 









0.082 



0.090 









800 



0.090 



0.078 



0.096 



0.096 





0.096 



0.090 



0.078 



900 









0.108 











1,000 





0.109 





0.131 











1,100 









0.151 











Displacement at Failure (in.) 









0.157 



0.090 









Pressure at Failure (psi) 



910 



1,030 



940 



1,170 



700 



1,170 



950 



700 



Note: 50-psi preload. 



74 



