Two aircraft engineers have invented a system of whirling cables which they propose as g protection against aerial bombs for such vital spots as canals, locks and ships passing through them. On the top of a 150-fopt steel tower would be a rotating hub fifty feet in diameter, Around this hub would be a ‘dozen cable drums with 225 feet of two-inch flexible cable on each, spaced two degrees apart. As an alarm signals approaching bombers, the hub would start revolving and the drums would gradually unwind until the long cables are spinning around fifty times per minute, covering an area 500 feet in diameter. Each cable in this centrifugal bomb guard would have such weight and speed that it would strike the bomb with a force double that of the bomb itself. A 1,000-pound bomb falling at 400 miles an hour has about 5,000,000 pounds of kinetic energy; each cable would have 10,000,000 pounds, enough to destroy or deflect the bomb. A working model of this apparatus has been demonstrated to American military experts.