Year: 1967
Type: article
Abstract: Inertial-platform accelerations and attitudes were used with trajectory data to calculate the flight aerodynamic characteristics of the entry configuration (command module).The flight results, in the form of aerodynamic angles, force coefficients, and coefficient ratios, were compared with trimmed wind-tunnel data predictions and with wind-tunnel data adjusted to the flight angle of attack.The comparisons showed the flight trim angle of attack to be higher than predicted at the initial high-Machnumber, low-Reynolds-number entry conditions, resulting in a correspondingly low (18 percent) liftto-drag ratio.Both flight angle of attack and liftto-drag ratio were essentially linear down to the high -supersonic -Mach-number region where there was good agreement with the predicted values.The areas of poor agreement were caused by poor trimangle predictions and not by poor wind-tunnel resultant force data..
Author: E. R. Hillje
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W751310485