Momentum-Impulse Balance and Parachute Inflation: Clusters

摘要: I N a previous publication [1] the momentum-impulse theorem (or MI theorem) was used for estimating maximum parachute drag forceFmax generated during inflation. This paper showed how to calculate Fmax any type of parachute, reefing, and drop conditions. The author [2] continued discussion, this time by applying amore specific application, namely that hemispherical parachutes dropped from fixed points such as cranes, buildings, or very slow-moving aircraft. engineering note continues using impulse momentum concepts, analysis clusters slowor fast aircraft (parachute are built connecting at least two side-by-side [3]). As with [1,2], goal here is sharpen our understanding inflation process in general cluster particular, new analytical approximations derived theorem. In some cases, these confirm key knowledge so far has been acquired only empirically. other results suggest altogether extended conclusions. estimator herein based on following formula, which expresses terms priori opening-shock factor Ck [1,3–5]: