A Comprehensive Defect Investigation of Cartridge Ejector Release Unit for Aerial Bomb Deployment Mechanism

Parate B, Sharma R, Salkar Y and Singh H

Published on: 2025-12-17

Abstract

The state of art of this research article is to carry out the comprehensive study on defect investigation of Cartridge Ejector Release Unit (CERU) to operate aerial bomb deployment mechanism. CERU is a critical component ensuring precise and reliable release of the bomb from Ejector Release Unit (ERU). The necessity of research paper is to investigate defects in CERU, analyzing root causes, and potential mitigation strategies. The various research methods were applied on the failure analysis techniques, like Ishikawa technique and 5 Why technique including visual inspection of cartridge, material analysis, and functional testing of the cartridge in Closed Vessel (CV). Aluminum case shows the cracks and blow holes after conduct of various proof lots. This happened due to high flame temperature of pyrotechnic composition used in the explosive train. Recommendations include design modifications, i.e. Teflon insert was introduced in between the inner wall of cartridge case and the propellant, and Electroless Nickel (EN) coating on cartridge cases that enhanced quality control. This research paper described about defect investigation of CERU that fails during lot proof trials. The novelty of this work is to avoid defects by carrying out research using various experiments on CERU. Failures of such devices lead to jamming of ERU pylon. The output of this study is to prevent the defects by carrying out innovative ideas of applying EN coating and introduction of teflon insert that eliminates these defects. The authors have contributed in these modifications, the main results of this manuscript that many lots were successfully produced and supplied to users to meet their emergent requirements.