Volume 89, Number 4, February 2010
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||04 March 2010|
Two-dimensional descent through a compressible atmosphere: Sequential deceleration of an unpowered load
Department of Physics, Trinity College - Hartford, CT 06106, USA
Corresponding author: email@example.com
Accepted: 1 February 2010
Equations, based on Rayleigh's drag law valid for high Reynolds number, are derived for two-dimensional motion through a compressible atmosphere in isentropic equilibrium, such as characterizes the Earth's troposphere. Solutions yield horizontal and vertical displacement, velocity, and acceleration as a function of altitude and ground-level temperature. An exact analytical solution to the equations linearized in the aero-thermodynamic parameter is given; in general the equations must be solved numerically. The theory, applied to the unpowered fall of a large aircraft stabilized to flat descent by symmetrical, sequential deployment of horizontal and vertical decelerators, shows that such an aircraft can be brought down with mean peak deployment and impact decelerations below 10g.
PACS: 89.20.-a – Interdisciplinary applications of physics / 89.20.Bb – Industrial and technological research and development / 89.40.Dd – Air transportation
© EPLA, 2010
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