- Volume 11 Issue 4
The repetitive vibrating action of an aerodynamic load causes an external fuel tank's horizontal fin to experience a shorter life cycle than its originally predicted one. Store separation analysis is needed to redesign the fin of an external fuel tank. In this research, free-drop tests were conducted using 15% scaled models in a subsonic wind tunnel in order to analyze the store separation characteristics of an external fuel tank. The store separation trajectory based on grid tests was also obtained to verify the results of the free-drop tests. The results acquired from the free-drop tests correlated well with the grid tests in regards to the trajectories and behavior of the stores separated from the aircraft. This agreement was especially noted in the early stages of the store separation.
External fuel tank;Store separation;Wind tunnel test;Free-drop test;Grid test;Trajectory
- Barlow, J. B., Rae, W. H., and Pope, A. (1999). Low-Speed Wind Tunnel Testing. 3rd ed. New York: Wiley.
- Cenko, A. (2009). Lessons learned in 30 years of store separation testing. 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, FL.
- Cho, H. K., Lee, S. H., Jang, Y. I., and Kang, C. H. (2009). A decade of KAFA subsonic wind tunnel operation. Fall Annual Meeting of the Korean Society for Aeronautical and Space Sciences, Gyeongju, Korea.
- Kang, C. and Yoon, Y. (2008). study of external fuel tank horizontal fin crack analysis and a replacement method. Fall Annual Meeting of the Korean Society for Aeronautical and Space Sciences, Jeju, Korea.
- Kang, C. H., Cho, H. K., Jang, Y. I., Lee, S. H., and Kim, K. Y. (2010). Analysis of the longitudinal static stability and the drop trajectory of a fighter aircraft’s external fuel tank. Journal of the Korean Society for Aeronautical and Space Sciences, 38, 274-279. https://doi.org/10.5139/JKSAS.2010.38.3.274
- Keen, K. S., Morgret, C. H., Langham, T. F., and Baker Jr, W. B. (2009). Trajectory simulations should match flight tests and other lessons learned in 30 years of store-separation analysis. 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, FL.
- Kim, J. H., Sohn, C. H., Lee, I., and Yang, H. D. (2006). T-50/A-50 FSD stores separation program. AIAA Atmospheric Flight Mechanics Conference and Exhibit, Keystone, CO. pp. 1-13.
- Spahr, H. R. (1974). Theoretical store separation analyses of a prototype store and comparison with a flight drop test. AIAA Mechanics and Control of Flight Conference, Anaheim, CA.
- Them, J. W. and Chiang, K. (1970). Experimental determination of moments of inertia by the bifilar pendulum method. American Journal of Physics, 38, 537-539. https://doi.org/10.1119/1.1976385
- Veazey, D. T. (2004). Current AEDC weapons separation testing and analysis to support flight testing. USAF Development Test and Evaluation Summit, Woodland Hills, CA.
- Yoon, Y. H., Cho, H. K., Chung, H. S., Cho, D. H., Lee, S. H., and Baek, S. W. (2009). Experimental study for safety analysis of an external store separation from fighter aircraft. Journal of the Korean Society for Aeronautical and Space Sciences, 37, 232-239. https://doi.org/10.5139/JKSAS.2009.37.3.232
- Yoon, Y. H., Cho, H. K., Chung, H. S., Lee, S. H., and Han, C. H. (2008). Numerical study of an external store released from a fighter aircraft. Journal of the Korean Society of Computational Fluids Engineering, 13, 80-85.