in-line/out-of-line 

 plunger 



Figure 17. Nonordnance, reusable safe-and-arm 

 device (S/A) for CEL 20K anchor. 



TEST RESULTS 



A summary of aii test data derived during this 

 development is provided in Table 3 This table 

 includes general site information, gun performance 

 holding capacity, and penetration data where availa- 

 ble. Holding capacity is subdivided into puUout and 

 no pullout. No puUout means that either the anchor 

 line (downhaul cable) parted before pullout (Test 

 17), the anchors were used in an actual installation 

 and just proof-tested (Tests 24 to 26), or the ship was 

 incapable of pulling the anchors free (Tests 35 and 

 36). The last two tests were part of an amphibious 

 operation, and load-measuring equipment was 

 unavailable. During the initial stages of testing, 

 reduced propellant charges were used until it w" 

 determined that gun pressures were close to those 

 predicted and that the fluke, which was not dynam- 

 ically tpsted on land, was actually penetrating cor- 

 recdy and was structurally sound. Test 11 was the 

 first time a peak charge was used. 



Sediment Tests 



Even though the data are somewhat limited, it is 

 sufficient to generally show that the anchor does 

 work. As expected, the largest holding capacities were 

 recorded in silty sand, sand, and stiff clay, with the 

 lowest in soft clay. The capacities in sands were 

 actually somewhat higher than expected; this has 

 resulted in a larger downhaul cable (7/8-inch diameter 

 vice 3/4-inch diameter) to fully utilize fluke 

 capabilities in this medium. This larger cable was used 

 during tests 35-36, and the anchors could not be 

 dislodged from a sand seafloor. The loads, though 

 unmeasured, must have been considerable, because 

 the impetus of a Navy warping tug was used to 

 generate the pullout force. Tests 1, 3, and 17 illus- 

 trate the high capacities that can be achieved in a silty 

 sand seafloor. Tests 1 and 3 were witii reduced 

 charges (peak gun pressures were 17 and 23 ksi, 

 respectively), while test 17 used the maximum design 

 charge (peak pressure was 35 ksi). The anchor fluke 

 for test 17 was not pulled out prior to parting the 

 wire. 



16 



