UNCLASSIFIED 
Security Classification 
DOCUMENT CONTROL DATA-R&D 
(Security classification of title, body of abstract and indexing annotation must be entered when the overall report is classified) 
Naval Civil Engineering Laboratory as 
ee hai 3 : ae 2 ite a a 
3. REPORT TITLE 
FEAT DISC ACRYLIC PLASTIC WINDOWS FOR MAN-RATED HYPERBARIC CHAMBERS AT THE USN 
EXPERIMENTAL DIVING UNIT 
4. DESCRIPTIVE NOTES (Type of report and inclusive dates) 
5. AUTHOR(S) (First name, middle initial, last name) 
J. D. Stachiw 
eae a Chia one 
November 1970 37 2 
8a. CONTRACT OR GRANT NO. 9a. ORIGINATOR'’S REPORT NUMBER(S) 
6, PROJECT NO. TN-1127 
56-020 
c. 9b. OTHER REPORT NO(S) (Any other numbers that may be assigned 
this report) 
10. DISTRIBUTION STATEMENT 
This document has been approved for public release 
and sale; its distribution is unlimited. 
11. SUPPLEMENTARY NOTES 12. SPONSORING MILITARY ACTIVITY 
Supervisor of Salvage 
13. ABSTRACT 
Flat disc acrylic plastic windows have been designed, fabricated, evaluated 
and delivered to EDU for replacement of glass windows used to date. The large 
(D = 6.950 inches; t = 1.650 inches) and the small (D = 4.450 inches,°t = 1.040 
in@hes) windows have been found on the basis of an extensive evaluation program 
to be more than adequate for man-rated service under 450 psi maximum operational 
pressure in steel flanges with D, (diameter of opening in flange) of 5. 5000 and 
3.000 inches. All windows were prooftested to 675 psi pressure at 120°F ambient 
temperature prior to delivery. 
FORM 
DD 1 NOV 1473 VES ll UNCLASSLFLED 
S/N 0101- 807-6801 Security Classification 
