12 Matching Results

Search Results

Advanced search parameters have been applied.

Analysis of means of improving the uncontrolled lateral motions of personal airplanes

Description: From Summary: "The purpose of this investigation was to determine whether such airplanes could be made to fly uncontrolled for an indefinite period of time without getting into dangerous attitudes and for a reasonable period of time (one to three minutes) without deviating excessively from their original course. The results of this analysis indicated that the uncontrolled motions of a personal airplane could be made safe as regards spiral tendencies and could be greatly improved as regards maintenance of course without resort to an autopilot."
Date: December 1949
Creator: McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Analysis of means of improving the uncontrolled lateral motions of personal airplanes

Description: From Summary: "A theoretical analysis has been made of means of improving the uncontrolled motions of personal airplanes. The purpose of this investigation was to determine whether such airplanes could be made to fly uncontrolled for an indefinite period of time without getting into dangerous attitudes and for a reasonable period of time (1 to 3 min) without deviating excessively from their original course. The results of this analysis indicated that the uncontrolled motions of a personal airplane could be made safe as regards spiral tendencies and could be greatly improved as regards maintenance of course without resort to an autopilot."
Date: 1951
Creator: McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Experimental Determination of the Effect of Negative Dihedral on Lateral Stability and Control Characteristics at High Lift Coefficients

Description: Report presenting the effects of negative dihedral on lateral stability and control characteristics at high lift coefficients determined by flight tests with a model. As the effective dihedral was decreased, the model became increasingly difficult to fly. Results regarding the effect of directional stability and lift coefficient on flight behavior are also provided.
Date: January 1946
Creator: McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Experimental determination of the effects of dihedral, vertical-tail area, and lift coefficient on lateral stability and control characteristics

Description: Report presenting the effects of wide variations of dihedral, vertical-tail area, and lift coefficient on lateral stability and control and on general flying characteristics as determined by flight tests in the free-flight tunnel. The geometric dihedral angle and vertical-tail angle were varied in order to vary the effective dihedral angle and directional stability of the model. Results regarding spiral stability, oscillatory stability, lateral control, and general flight behavior are provided.
Date: July 1946
Creator: McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

A Preliminary Study of the Problem of Designing High-Speed Airplanes With Satisfactory Inherent Damping of the Dutch Roll Oscillation

Description: Report presenting an investigation to create a design for fighter airplanes to have better inherent stability than most current designs. The main purpose of this design change is to obtain satisfactory stability of the Dutch roll oscillation without complicated artificial stabilizing devices. Results regarding the causes of inadequate dutch roll stability, means of improving dutch roll stability, and application of experimental design results to actual airplanes are provided.
Date: October 1953
Creator: Campbell, John P. & McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Flight Characteristics at Low Speed of Delta-Wing Models

Description: Report presenting an investigation to obtain a survey of the flying characteristics at low speeds of models with low-aspect-ratio delta wings. Four models with triangular plan-form sweptback wings and five models with the tips cut off to give taper ratios were tested. Results regarding the stability and control characteristics of each of the models is provided.
Date: January 13, 1948
Creator: McKinney, Marion O., Jr. & Drake, Hubert M.
Partner: UNT Libraries Government Documents Department

A Study of the Problem of Designing Airplanes With Satisfactory Inherent Damping of the Dutch Roll Oscillation

Description: "Considerable interest has recently been shown in means of obtaining satisfactory stability of the dutch roll oscillation for modern high-performance airplanes without resort to complicated artificial stabilizing devices. One approach to this problem is to lay out the airplane in the earliest stages of design so that it will have the greatest practicable inherent stability of the lateral oscillation. The present report presents some preliminary results of a theoretical analysis to determine the design features that appear most promising in providing adequate inherent stability" (p. 1).
Date: 1954
Creator: Campbell, John P. & McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Theoretical Analysis of the Lateral Stability of a Glider Towed by Twin Parallel Towlines

Description: Report discusses a theoretical analysis of the lateral stability characteristics of a glider towed by two parallel towlines, which was correlated with previously reported dynamic flight testing. The glider appears to possess sufficient stability for satisfactory pilotless towed flight. The main factors affecting stability were the dihedral angle of the glider and the length of the towlines.
Date: November 1943
Creator: Pitkin, Marvin & McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Correlation of Experimental and Calculated Effects of Product of Inertia on Lateral Stability

Description: Report presenting a correlation of the experimental and calculated effects of the product of inertia on the stability of lateral oscillations of airplanes. The experimental and calculated boundaries were in good agreement with one another, but neglecting the product of inertia led to wide discrepancies. Results regarding stability and its influence on general flight behavior are provided.
Date: July 1947
Creator: McKinney, Marion O., Jr. & Drake, Hubert M.
Partner: UNT Libraries Government Documents Department

Generalized Performance Comparison of Large Conventional, Tail Boom, and Tailless Airplanes

Description: Report presenting an investigation to determine the performance of large tailless and conventional airplanes. The primary conclusion drawn fro the testing is that large all-wing tailless airplanes may have better performance characteristics than their equivalent tail-boom airplanes for certain types of missions. Results regarding a general performance comparison, performance variations with structural weight, landing speed, and take-off distance, and performance comparison based on arbitrary design specification are provided.
Date: October 1947
Creator: Ankenbruck, Herman O. & McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Flight Tests of a Glider Model Towed by Twin Parallel Towlines

Description: "The stability characteristics of a glider towed by twin parallel towlines have been studied in the NACA free-flight tunnel. A preliminary theoretical analysis of the stability of a glider restrained from yawing was followed by an experimental investigation of the stability of a model towed from fixed tunnel points in such a way as to simulate tow in level flight. The results of the tests confirm the theoretical analysis and indicate that a pilotless, stable, towed-glider system is possible when twin parallel towcables are used" (p. 1).
Date: April 1943
Creator: Pitkin, Marvin & McKinney, Marion O., Jr.
Partner: UNT Libraries Government Documents Department

Free-Flight-Tunnel Tests of a Target-Seeking Glide-Bomb Model With Flicker Lateral Control

Description: Report presenting an investigation of control systems suitable for target-seeking missiles. Testing occurred in the free-flight tunnel of the GB-5 glide bomb equipped with a light-seeker control unit which applied flicker control. Results indicated that good stability could be obtained with the control system, but was somewhat less stable than with a proportional control system.
Date: July 28, 1948
Creator: McKinney, Marion O., Jr. & Drake, Hubert M.
Partner: UNT Libraries Government Documents Department