Report on Investigations of Aviation Wires and Cables, Their Fastenings and Terminal Connections

In reference to our investigations of aviation wires and cables, their fastenings and terminal connections for stays, we have failed to find from past practice anything that would allow us to determine the best lines on which to proceed; therefore our study is not limited to anyone stay design.

In making our investigation we have aimed to eliminate the use of acid and solder, imperfect bends, flattening of cable on bends, injury to wire, strand, and cord due to unskillful handling of material in the field; and based on our study of present methods of manufacture of aeroplanes we believe it is possible to manufacture the complete stay here at the factory, proof test same to 50 per cent of its ultimate strength, measure same under stress, and therefore eliminate any uncertainty as to strength of terminal connection, length of stay, and workmanship.

On this basis our research covered not only the terminal connection for shop attachment, but also a connection that would allow repairs to be made in the field without requiring the use of blow torch and solder, and from the follow tests It will be readily seen that the development eliminates any doubt on this point.

We find present practice considers" the solid wire stay," consisting of one wire of suitable diameter and known to the trade as "aviation wire"; " the strand stay," consisting of either 7 or 19 wires stranded together and known to the trade as "aviator strand"; also "the cord or rope stay," consisting of 7 strands twisted together forming a rope, the strands being either 7 wires or 19 wires; and the rope known to the trade as "aviator cord."