Accession Number:

AD0499516

Title:

Test and Development of Molybdenum Gun Liners. Inspection, Proof and Firing Tests of 40mm Gun Barrel Type A Mod. 14 Serial No. 17 (Molybdenum Liner - Westinghouse No. BL 338)

Descriptive Note:

Partial rept. no. 21 and Final rept.

Corporate Author:

NAVAL PROVING GROUND DAHLGREN VA

Personal Author(s):

• Berry, C. D.

Report Date:

1952-06-06

Pagination or Media Count:

33.0

Abstract:

This report covers the second and third series of firing tests of 40mm barrel Type A Mod. 14 Serial No. 17 with short molybdenum liner Westinghouse No. BL 338. The liner was of lined worm construction consisting of 33 segments. The second segment which begins at about 12.125 in. from the breech face is made from one piece of molybdenum without the supporting steel ring. The molybdenum rings contained 0.2 cobalt forged discs having improvement in mechanical properties over previous molybdenum liners. The purpose of this test was to determine whether or not the subject barrel could withstand extended rapid-fire bursts using a hot propellant.

Descriptors:

• *GUN BARRELS
• VELOCITY
• SCATTERING
• ACCURACY
• EROSION
• BREECH MECHANISMS
• EXTERIOR BALLISTICS
• COBALT
• CAVITY LINERS
• CYCLIC RATE
• INTERIOR BALLISTICS
• GUN PROPELLANTS
• RINGS
• PRESSURE
• MOLYBDENUM
• FIRING TESTS(ORDNANCE)
• LIFE EXPECTANCY(SERVICE LIFE)

Subject Categories:

• Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE