Scientific American Volume 85 Number 10 (September 1901) . The Core of Involuted Sheets Assembled Ready for Winding. from bore to circumference, and every particle of themetal does its share of useful work. The system ofbuilt-up construction has undoubtedly been broughtto a high stage of excellence, as shown by the factthat modern built-up guns secure a muzzle velocityof 3,000 feet per .second with a maximum chamberpressure of 17 tons to the square method of securing the desired initial compres-. sion of the metal at the bore of the gun by shrinkingon steel hoops is open to the object
Scientific American Volume 85 Number 10 (September 1901) . The Core of Involuted Sheets Assembled Ready for Winding. from bore to circumference, and every particle of themetal does its share of useful work. The system ofbuilt-up construction has undoubtedly been broughtto a high stage of excellence, as shown by the factthat modern built-up guns secure a muzzle velocityof 3,000 feet per .second with a maximum chamberpressure of 17 tons to the square method of securing the desired initial compres-. sion of the metal at the bore of the gun by shrinkingon steel hoops is open to the objections that it isexceedingly expensive, the best guns costing a thou-sand dollars per ton weight of gun, and that it isnot possible to determine with absolute certainty justhow much initial strain exists in the gun after shrink-age. Moreover, in spite of the great care exercised inmanufacturing the tube and hoops, these parts are suffi- ciently large to contain unsuspected defects which can-not be detected even by the most careful a view to remedying these defects, thesystem of wire-wound gun construction was intro-duced, the credit for its inception being due to , in England, and the credit for its develop-ment and commercial introductionbeing due to the well-known Arm-strong firm. In this system thegun consists of an inner tube aboutwhich is wound a ribbon of steel,the accumulated tension of thewinding being calculated to producethe desired initial compression atthe bo
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