Prediction of Forces and Moments for Flight Vehicle Control Effectors. Part 1: Validation of Methods for Predicting Hypersonic Vehicle Controls Forces

By: Nasa, National Aeronautics and Space Adm

Many types of hypersonic aircraft configurations are currently being studied for feasibility of future development. Since the control of the hypersonic configurations throughout the speed range has a major impact on acceptable designs, it must be considered in the conceptual design stage. The ability of the aerodynamic analysis methods contained in an industry standard conceptual design system, APAS II, to estimate the forces and moments generated through control surface deflections from low subsonic to high hypersonic speeds is considered. Predicted control forces and moments generated by various control effectors are compared with previously published wind tunnel and flight test data for three configurations: the North American X-15, the Space Shuttle Orbiter, and a hypersonic research airplane concept. Qualitative summaries of the results are given for each longitudinal force and moment and each control derivative in the various speed ranges. Results show that all predictions of longitudinal stability and control derivatives are acceptable for use at the conceptual design stage. Results for most lateral/directional control derivatives are acceptable for conceptual design purposes; however, predictions at supersonic Mach numbers for the change in yawing moment due to aileron deflection and the change in rolling moment due to rudder deflection are found to be unacceptable. Including shielding effects in the analysis is shown to have little effect on lift and pitching moment predictions while improving drag predictions. Maughmer, Mark D. and Ozoroski, L. and Ozoroski, T. and Straussfogel, D. Unspecified Center AERODYNAMIC CHARACTERISTICS; AERODYNAMIC CONFIGURATIONS; AILERONS; AIRCRAFT CONFIGURATIONS; CONTROL EQUIPMENT; CONTROL SURFACES; HYPERSONIC AIRCRAFT; HYPERSONICS; PREDICTIONS; RUDDERS; SPACE SHUTTLE ORBITERS; X-15 AIRCRAFT; DEFLECTION; DESIGN ANALYSIS; DRAG; FLIGHT TESTS; INDUSTRIES; LONGITUDINAL CONTROL; LONGITUDINAL STABILITY; PITCHING MOMENTS; ROLLING MOMEN...

• Format: Paperback
• Language: English
• ISBN: 1731281331
• ISBN13: 9781731281333
• Release Date: January 1
• Publisher: Independently Published
• Length: 140 Pages
• Weight: 0.75 lbs.
• Dimensions: 0.3" x 8.5" x 11.0"