Accession Number : ADA131118

Title :   Heat Transfer and Erosion in the Ares 75mm High Velocity Cannon. Volume 2.

Descriptive Note : Technical rept. Dec 75-Oct 77,


Personal Author(s) : Vassallo,F A ; Brown,W R

PDF Url : ADA131118

Report Date : Oct 1977

Pagination or Media Count : 129

Abstract : Single-shot firings of the 75mm high velocity cannon conducted at Ares during initial weapon development, indicated potentially severe erosion of the breech end of the barrel (short barrel). Extended burst sequences were expected to aggravate the erosion thus threatening to shorten, intolerably, the practical barrel life. In an effort to improve longevity, Calspan conducted a study of the actual heating and erosion in the short barrel through experimental single-shot firing investigations using a fixture similar to that of the Ares Phase I cannon. Primary efforts in that study were directed to an assessment of the expected heating and erosion in the present 75mm cannon during rapid fire and the evaluation of potential solutions to indicated problems by use of barrel materials changes, and/or ammunition modifications. (Author)

Descriptors :   *Heat transfer, *Gun barrels, *High velocity, *Low alloy steels, Erosion, Thermal properties, Fatigue(Mechanics), Test equipment, Steel, Detectors, Carbon steels, Chromium, Plates, Refractory coatings

Subject Categories : Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE