Performance of the Rotor Systems Research Aircraft Calibrated Rotor‐Load‐Measurement System
Abstract:The compound Rotor Systems Research Aircraft (RSRA) is designed to make high‐accuracy, simultaneous measurements of all rotor forces and moments in flight. Physical calibration of the rotor force‐ and moment‐measurement system when installed in the aircraft is required to account for known errors and to ensure that measurement‐system accuracy is traceable to the National Bureau of Standards. The first static calibration and associated analysis have been completed with good results. Hysteresis was a potential cause of static calibration errors, but was found to be negligible in flight. compared to full‐scale loads, and analytical methods have been devised to eliminate hysteresis effects on calibration data. Flight tests confirmed that the calibrated rotor‐load‐measurement system performs as expected in fight and that it can dependably make direct measurements of fuselage vertical drag in hover.
Document Type: Research Article
Affiliations: NASA Ames Research Center, Moffett Field, California
Publication date: July 1, 1984
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