TEST PROGRAM 

 Land Tests 



The 10K anchor was tested to verify ballistic performance, water- 

 tight integrity, and structural soundness. The ballistics and structural 

 strength were checked by conducting Instrumented tests of the anchor 

 on land at the Pacific Missile Test Center, Point Mugu, California. The 

 hydrostatic seals were checked by a pressure test in CEL's Deep Ocean 

 Laboratory facility. 



The gun tube is a watertight container with seals designed to with- 

 stand water pressures of 20,000-foot (6,100 m) depths. However, the 

 safe-and-arm device (S/A) , which was purchased as a stock item from 

 the Magnavox Company, was guaranteed to only 200 feet (60 m) . The S/A 

 and gun tube were assembled and tested to a simulated ocean depth of 

 600 feet (185 m) and 1,200 feet (365 m) . The test procedure was to build 

 up pressure to the maximum value, hold for 10 to 15 minutes, and then 

 gradually release pressure. Two systems were tested to 300 psi (2 kPa) , 

 and, finding no leaks, the second two were tested to 600 psi (4 kPa) . 

 After testing, the anchors were disassembled and Inspected for signs 

 of leaks; each system was found to be watertight. Minor modification to 

 strengthen the S/A body should allow the anchor to operate to 20,000- 

 foot (6,100-m) depths. 



The propellant system is designed to impart high velocity to the 

 projectile in a short distance which results in high acceleration- 

 induced stresses experienced by both projectile and gun assembly. By 

 conducting test firings on land it was possible to examine both the 

 ballistic performance of the gun system and the structural integrity 

 of the launch vehicle. It was not feasible to use the actual anchor 

 projectile during land tests, so an equivalent mass of steel was sub- 

 stituted. 



The anchor was assembled and hung in a fluke-down vertical orienta- 

 tion from a wooden beam resting on a steel box frame. The anchor was 

 then loaded, armed, and fired. Six tests were conducted with charge 

 weights from 1.1 to 1.4 pounds (500 to 635 gm) . Each test was instrument- 

 ed for pressure measurements by a transducer and copper crush gages. 

 High-speed movies were taken of the firing to determine projectile 

 velocity and acceleration should the test results indicate performance 

 problems with the propulsion system. 



The last three tests included the use of a downhaul cable to deter- 

 mine the effectiveness of a new wire rope packing arrangement and the 

 potential use of chain as a downhaul. The wire rope was used in the 

 first test. The wire rope was faked into a sheet metal pack attached to 

 the test support frame with the bitter end of the wire rope attached to 

 the dummy anchor projectile. The chain downhaul was used on the last two 

 tests. The downhaul chain was prepared by placing a length of 1 /2-lnch- 

 diameter (13 mm) chain in tension and coating it with a two-part urethane 

 epoxy. When the epoxy hardens, it holds the chain in a pretensioned con- 

 figuration; thus, the chain can be used much like a cable, and the urethane 

 coating is flexible enough to allow faking of the chain. 



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