10 research outputs found
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NACA Advanced Restricted Reports
Report presenting a series of tests made in the 15-foot free-spinning tunnel to study the spin characteristics of a model of a hypothetical canard airplane, which was designed to be about the same size and have the same general aerodynamic characteristics as a Boeing B-247 airplane. The model spun normally and had excellent recovery characteristics
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NACA Memorandum Reports
Report presenting testing of a model of the Northrop XB-35 airplane in the free-spinning tunnel in order to determine the spin characteristics and tumbling tendencies of the airplane. The spin tests indicated that for the normal loading condition, the model would not spin in the direction of the rudder for either the clean or the landing condition unless the wheel was set over with the rudder. Results regarding the spin tests in the clean condition, spin tests in the landing condition, tumbling tests, and consideration of control forces are provided
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NACA Technical Notes
Note presenting an analysis for interpreting results of dynamic tests of a model investigated at full-scale Mach number in terms of the corresponding full-scale body. The analysis indicates that dynamic similarity for such a condition can be closely approximated although the effect of gravity is not to scale
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NACA Technical Notes
Report presenting a model of a hypothetical canard airplane, which was designed to be of the same size and general aerodynamic characteristics of a Boeing B-247 airplane in the gust tunnel at one wing loading, one forward speed, one gust velocity, and three gust gradients
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NACA Technical Notes
Note presenting an analysis of the relative distribution of mass along the wings and fuselage and the relative density of the airplane as well as the design of vertical surfaces when determining design requirements for aircraft tail surfaces. A chart is presented that shows an empirical relationship between a tail-damping power factor and the relative density and mass distribution for satisfactory spin recovery