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The Influence of Bobweights and Downsprings on Flying Qualities
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English
Abstract
Control-system bobweights and downsprings are quite often used in general aviation airplanes to improve longitudinal static stability at aft c.g. positions. However, these devices can also have strong and usually undesirable effects on the airplane's dynamic behavior. These important effects are reviewed and discussed. In addition, guidance is provided as to how some of the undesirable characteristics can be minimized by careful design.
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Authors
Citation
Neal, T., "The Influence of Bobweights and Downsprings on Flying Qualities," SAE Technical Paper 710388, 1971, https://doi.org/10.4271/710388.Also In
References
- Chalk C. R. Neal T. P. Harris T. M. et al “Background Information and User Guide for MIL-F-8785B(ASG), Military Specification - Flying Qualities of Piloted Airplanes.” Air Force Report AFFDL-TR-69-72 August 1969
- Goldberg J. H. “Effects of Spring and Inertia Devices on the Longitudinal Stability of Aircraft.” Air Force WADC Technical Report 53-350 July 1953
- Greenberg H. Sternfield L. “A Theoretical Investigation of Longitudinal Stability of Airplanes with Free Controls Including the Effect of Friction in Control System.” NACA Report No. 791 1944
- Jones R. T. Cohen D. “An Analysis of the Stability of an Airplane with Free Controls.” NACA Report No. 709 1941
- Neal T. P. “The Influence of Bobweights on Pilot-Induced Oscillations.” American Institute of Aeronautics and Astronautics, Paper No. 70-1002 August 1970