A theory of three-dimensional parachute dynamic stability
Document Type
Article
Date of Original Version
1-1-1968
Abstract
The three-dimensional motion of a freely descending parachute is studied with a five-degreeof- freedom analysis (the roll motion is neglected). The equations of motion are nondimensionalized and the resulting parameters discussed. Exact expressions are given for the longitudinal and lateral small-disturbance stability of the familiar gliding motion of parachutes. The breakdown of these small-disturbance expressions is illustrated by exact large-disturbance studies. A large longitudinal disturbance of most parachutes will result in a large pitching motion, whereas a large lateral (out of the glide plane) disturbance will usually cause a large angle vertical coning motion. Exact algebraic expressions are given for the coning mode, which is a stable rotation, and a small amount of available coning data is included for comparison. Some parametric computer studies of the various motions are also shown.
Publication Title, e.g., Journal
Journal of Aircraft
Volume
5
Issue
1
Citation/Publisher Attribution
White, Frank M., and Dean F. Wolfj. "A theory of three-dimensional parachute dynamic stability." Journal of Aircraft 5, 1 (1968): 86-92. doi: 10.2514/3.43912.
