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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Some landing studies pertinent to glider reentry vehicles
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Dyna-Soar Glider-configuration evolution
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Stability, flight control, and energy management of the Dyna-Soar glider
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Dyna-Soar glider flight envelope structural parameters
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Development of truss type Dyna-Soar glider structure
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Pilot factors influencing Dyna-Soar glider design
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Flutter analysis of a glider made of synthetic materials
A description of the flutter behavior of the Standard Cirrus is given. Steady vibration tests were conducted, and vibration and flutter calculations were made.
Characteristics of Flow Past Fuselages and Wing-Fuselage Systems of Gliders
The results are presented for visualization tests and measurements of the velocity field in diffusion regions (with a positive pressure gradient) for fuselages and transition regions between the wing and the fuselage. Wind tunnel and flight tests were performed. Specific emphasis was placed on examining the secondary flow influencing separation acceleration and the influence of the geometrical form of the wing fuselage system manifested by the occurrence of secondary flows of various types.
Discussion of test results in the design of laminar airfoils for competition gliders
The deformation of flow in the boundary layer and the local separation of a laminar layer (laminar bubbles) from various airfoils were investigated. These phenomena were classified and their influence is discussed. Various aerodynamic characteristics are discussed and the principles for prescribing pressure distribution to attain a high value of c sub z max with a possibly low drag coefficient are described.
The Penguin: a Low Reynolds Number Powered Glider for Station Keeping Missions
The Penguin is a low Reynolds number (approx. 100,000) remotely piloted vehicle (RPV). It was designed to fly three laps indoors around two pylons in a figure-eight course while maximizing loiter time. The Penguin's low Reynolds number mission is an important one currently being studied for possible future flights in the atmospheres of other planets and for specialized military missions. Although the Penguin's mission seemed quite simple at first, the challenges of such low Reynolds number flight have proven to be quite unique. In addition to the constraint of low Reynolds number flight, the aircraft had to be robust in its control, highly durable, and it had to carry a small instrument package. The Penguin's flight plan, concept, performance, aerodynamic design, weight estimation, structural design, propulsion, stability and control, and cost estimate is detailed.
Lessons of the glider meets
While light loading was assumed to be the optimal conformation from previous meets, subsequent meets have shown that heavier loading produced better results.
Experimental Determination of the Lateral Stability of a Glider Towed by a Single Towline and Correlation with an Approximate Theory
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Static stability and control of hypersonic gliders
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Wind-tunnel Investigation of the Low-speed Aerodynamic Characteristics of a Hypersonic Glider Configuration
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Tests of the Northrop MX-334 Glider Airplane in the NACA Full-scale Tunnel
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Flight Tests of a Glider Model Towed by Twin Parallel Towlines
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Engines and propellers for powered gliders and light airplanes
The object of the present paper is to consider the interaction of engine, propeller, and airplane for the low-power range. The discussion is presented in a form so as to provide the engine builder with a basis in his selection in the type of engine required, a suitable selection being possible only in connection with considerations on the best possible propeller.