Hydrofluidic stability augmentation systems (HYSAS) were evaluated in operational military helicopters for 1-1/2 years to establish a measure of maintainability and reliability for this relatively new technology. Design details, manufacturing problems encountered, installation experiences, and operational problems are discussed. Reliability predictions for fluidic systems and a similar electronic stabilization system are also presented. (Author)


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    Advanced Hydrofluidic Stabilization System

    M. E. Ebsen / J. O. Hedeen | NTIS | 1972


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