The main function of aircraft ejection system is that it separates the store from the aircraft. The ejection force is important for the safety of the aircraft when the store is ejected, because the store can be lifted by air flow affected by the aircraft’s speed. If the ejection force is low, the aircraft can be damaged by the floating store. The ejection force of the suspension system should be designed in order to release the store safely. In this study, the ejection force of the pyrotechnic suspension using the cartridge to eject the store was researched. This research was performed, based on the precedent study about the over-center linkage mechanism and the pressure drop by the orifice. The ejection force was calculated, after analyzing mathematical fundamentals about the pressure in the system of the suspension and analyzed through AutoDyn and ADAMS software. Finally, the theoretical results were compared with the ejection test results of the suspension system.

An airborne black box should preserve the recorded data under the extreme environmental conditions such an aircraft crash. Through the recorded information from the black box, the cause of the aircraft crash can be analyzed. This requires the black box to safely protect its memory board inside from the external forces or heat generated by the aircraft crash. This paper is a case study conducted to develop the black box to satisfy the crash survival requirements of ED-112A, the standard of performance to develop the black box, and optimize its weight and size. Through the sequential design, analysis, and test process, the black box successfully demonstrated the optimized design, analysis and test subjected to crash survival requirements of ED-112A. The prototype of the black box was fabricated and tested for the verification of each analysis within the requirements of ED-112A.

The Store Automatic Fixing Equipment operates as an external force acting on fixing the Store during the flight and as a device designed to prevent the Store from being shaken when the aircraft is flying with the Store. In this paper, we derived the mathematical modeling of the Store Automatic Fixing Equipment through the analysis of the operating principles of the Equipment. The gap occurred by the external vibration forces was calculated through the mathematical model and structure analysis. And then the shape and stiffness design of the wedge, i.e., the Store Automatic Fixing Equipment was derived by the mathematical modeling and structural analysis. We made the Store Automatic Fixing Equipment and took the vibration testing under the aircraft flight conditions. We used the load cell to measure the reaction forces acting on the gap between the Store Automatic Fixing Equipment and the Store. The results of the reaction force measurements were compared with the analysis results of the design and the suitability of the Store Automatic Fixing Equipment’s design was verified based on the analysis.