Accession Number:

AD0728108

Title:

Analysis of M125 Booster Mechanism

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS ADELPHI MD

Personal Author(s):

Report Date:

1971-06-01

Pagination or Media Count:

64.0

Abstract:

A mathematical analysis of the M125 booster safety and arming mechanism is presented. It provides a better insight into the mode of operation of the M125 and the effect of certain design parameter variations on the mechanisms performance. This analysis was made in support of product improvement efforts on the S and A device for the M514A1E1 artillery proximity fuze. Equations of motion involving 33 design and operating parameters of the mechanism and both phases of the rotors movement are developed and discussed. In developing an expression for the damping torque due to escapement action, it is assumed that the rotors angular velocity is proportional to the square root of the driving torque. Computations for the damping coefficient are based on a prior detailed dynamic analysis of the escape wheel and pallet covering their six phases of motion per cycle. The final equations of motion are nonlinear digital simulation methods were therefore used for their solution. Illustrated and discussed are time, rate, and turns-to-arm versus spin speed also, displacement, velocity, and acceleration are considered as a function of time at high- and low-spin rates 100 and 30 rps.

Subject Categories:

  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE