PGU-2/B SAPHE
A 20mm Semi-Armor Piercing High Explosive (SAPHE) ammunition, designated the PGU-2/B, was designed, developed, fabricated, and evaluated by Honeywell Inc Hopkins Mn Government And Aeronautical Products Division from 28 August 1968 through 15 August 1972. This design incorporated an all-impact angle base fuze evolved from the feasibility effort.
The resulting 20mm SAPHE round is designed to meet or exceed the technical requirements of the M50 series ammunition. It is also designed to be directly interchangeable in the present M39 and M61 gun systems without change or modification to the gun or feed (with the exception of coil spring rates). The initial baseline development included contractor design, development tests, and delivery of over 3,000 cartridges for Government evaluations.
Additional effort included fuze design modifications to investigate the feasibility of increasing the minimum arming distance to 6 meters, with 15 meters desired, development tests, and delivery of six cutaway display models.
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