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NASA-TN-D-30: Flight Investigation of the Lift and Drag Characteristics of a Swept-Wing, Multijet, Transport-Type Airplane
Abstract: The lift and drag characteristics of a Boeing KC-135 airplane were determined during maneuvering flight over the Mach number range from 0.70 to 0.85 for the airplane in the clean configuration at an altitude of 26,000 feet. ...
NASA-CR-3295: Selected advanced aerodynamics and active controls technology concepts development on a derivative B-747 aircraft
Abstract: Analytical design and wind tunnel test evaluations covering the feasibility of applying wing tip extensions, winglets, and active control wing had alleviation to the model B747 are described. Aerodynamic improvement offered ...
NASA-CR-114760: Noise levels of operational helicopters of the OH-6 type designed to meet the LOH mission
Abstract: Formulas relating overall sound pressure level (OASPL) to parameters such as horsepower required, tip speed, and thrust for main and tail rotors are presented for standard and quieted helicopters. Formulas relating OASPL ...
NASA-TM-81745: Low and high speed propellers for general aviation - Performance potential and recent wind tunnel test results
Abstract: The performance of lower speed, 5 foot diameter model general aviation propellers, was tested in the Lewis wind tunnel. Performance was evaluated for various levels of airfoil technology and activity factor. The difference ...
NASA-CR-1706: Investigation of DC-8 nacelle modifications to reduce fan-compressor noise in airport communities. Part 2 - Design studies and duct-lining investigations
Abstract: Modifications to reduce fan-compressor noise level of DC-8 aircraft - Part 2.
NASA-TM-4368: NASA aerodynamics program
Abstract: The annual accomplishments is reviewed for the Aerodynamics Division during FY 1991. The program includes both fundamental and applied research directed at the full spectrum of aerospace vehicles, from rotorcraft to planetary ...
NASA-CR-2200: Maximum likelihood identification and optimal input design for identifying aircraft stability and control derivatives
Abstract: A new method of extracting aircraft stability and control derivatives from flight test data is developed based on the maximum likelihood cirterion. It is shown that this new method is capable of processing data from both ...
NASA-CR-3704: DC-10 winglet flight evaluation
Abstract: The results of a flight evaluation of winglets on a DC-10 Series 10 aircraft are presented. For sensitive areas of comparison, effects of winglets were determined back to back with and without winglets. Basic and reduced ...
NASA-TR-D-594: Characteristics of six propellers including the high-speed range
Abstract: This investigation is part of an extensive experimental study that has been carried out at full scale in the NACA 20-foot tunnel, the purpose of which has been to furnish information in regard to the functioning of the ...