Investigation of Embedding an Anchor by the Pulse-Jet Principle

摘要

To develop an embedment anchor to hold at 200 times its own weight of 25 lbs. extends the art of deep anchorings at small cost if a ballistic anchor containing a reciprocating mechanism can be materialized. Three general concepts are merged in one device: (1) about half the ultra high pressure energy released from a powder charge is used for ballistic penetration of the sea bottom. (2) A fraction of the balance of this energy is trapped at high working pressure and deepens the penetration by driving a simple, short-lived, reciprocating machine which executes less than 1000 cycles. (3) Depletion of the trapped high pressure is finally downward at low pressure from the nose of the anchor so as to transport away bottom material which has been loosened by the action of the machine. All main components are identified and dimensions are chosen to make these concepts compatible, and lead to a metal weight slightly in excess of the 25 lbs. goal. Performance of the embedment depends on details of the interaction between the anchor and local sea bottom and must be development tested. (Author)