Computation of the Safety Fans for Multistage Aerodelivery Systems
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL AND ASTRONAUTICAL ENGINEERING
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This paper deals with the development of a mathematical foundation and practical algorithms to compute the safety fans to be used in conjunction with aerodynamic deceleration payload delivery systems tests. The paper provides formulas to compute a descentgliding trajectory for a multiple-stage system and then considers several cases of major failures, It also introduces the concept of ballistic winds, simplifying calculation of the safety fans so that the computer is no longer needed, and shows how to carefully calculate these ballistic winds based on the best known winds aloft. Finally, the paper introduces the graphical user interface developed and tested by the authors that is supposed to provide test planning officers with a unique variety of trade-off options as well as to effectively represent all safety-related information both to the ground personnel and to the crew performing a payload delivery from a transport aircraft or helicopters.
- Fluid Mechanics