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  • AIRCRAFT  (324)
  • Biochemistry and Biotechnology
  • 1970-1974  (413)
  • 1972  (413)
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  • 1970-1974  (413)
Year
  • 1
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    Recent NASA handling qualities research (1972)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A comprehensive review of NASA research results documented since the mid-1960's and some recently completed programs on aircraft handling qualities are presented. In addition to handling qualities research pertaining to vehicle stability and control characteristics, investigations related to specialized piloting tasks, cockpit displays, and environmental factors are summarized. The background leading to NASA's handling qualities research activities is discussed, and programs that have received major emphasis are indicated. For general aviation aircraft, the survey includes investigations aimed at improving handling qualities by incorporating increasingly sophisticated stability augmentation and display systems, simplifying the approach and landing task for relatively inexperienced pilots, and establishing the basic effects of turbulence. Research on the specialized piloting problem of steeper instrument approaches for noise abatement and investigations with a representative first generation aircraft are reviewed in the section on subsonic jet transports. Supersonic cruise aircraft programs include a variety of simulation studies related to supersonic transport designs and flight tests with the XB-70 aircraft. Investigations of high angle of attack loss of control problems and a flight study of direct lift control utilization for formation flying and aerial refueling are discussed in the review of tactical military aircraft research.
    Keywords: AIRCRAFT
    Type: AGARD Handling Qualities Criteria; 25 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A Structural Design for an Externally Blown Flap (EBF) Medium STOL Research Aircraft (1972)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: A computer program to predict, by reference to structural drawings, the dynamic response of a high lift STOL wing with externally blown flaps was developed. Structural data for the computer program are presented in the form of sketches, weight and dynamic loads information graphs, and tables for an external blown, triple-slotted flap, high lift STOL transport wing. Weight, mass distribution, and moment of inertia data are summarized in table form and presented pictorially by drawing layout. The methods used for obtaining weight data were: (1) actual know, weight of components, (2) preliminary stress sizing, and (3) statistical weight estimating methods.
    Keywords: AIRCRAFT
    Type: NASA-CR-112249
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A Flying Ejection Seat (1972)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: To increase aircrewmen's chances for safe rescue in combat zones, the armed forces are investigating advanced escape and rescue concepts that will provide independent flight after ejection and thus reduce the risk of capture. One of the candidate concepts is discussed; namely, a stowable autogyro that serves as the crewman's seat during normal operations and automatically converts to a flight vehicle after ejection. Discussed are (1) the mechanism subsystems that the concept embodies to meet the weight and cockpit-packaging constraints and (2) tests that demonstrated the technical feasibility of the stowage, deployment, and flight operation of the rotor lift system.
    Keywords: AIRCRAFT
    Type: NASA. Lyndon B. Johnson Space Center The 7th Aerospace Mech. Symp.; p 275-286
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Some applications of buoyancy systems and parawings to replace conventional and proposed transportation systems. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: An exploratory study has been conducted to assess the performance potential of buoyant airships and parawings in short-haul passenger transportation. Results show that such systems can be used effectively, from a performance standpoint, in a VTOL or STOL mode of operation. A supplementary assessment of potential applications of such vehicles is examined, with a brief look at economic factors and an examination of missions for which they might be effectively used.
    Keywords: AIRCRAFT
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Active controls - Changing the rules of structural design. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Approaches making use of aerodynamic surfaces in combination with advanced flight computers, and electrohydraulic systems could be used to improve economics of commercial aircraft operation, smooth the passenger's ride, reduce terminal-area noise, and ease terminal-area congestion. This emerging technology is becoming known as active controls technology. Maximum benefits from active controls can come only by considering controls early in the design cycle. Active controls can save weight by reducing the structural strength necessary. Some of the technical benefits of active controls would increase return on investment and raise profits. Details of a proposed active controls research program are discussed.
    Keywords: AIRCRAFT
    Type: Astronautics and Aeronautics; 10; Aug. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Advanced subsonic transport technology. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: NASA has undertaken an Advanced Transport Technology Program directed toward defining technology advances that would contribute to a superior subsonic long-haul transport aircraft for conventional takeoff and landing. The aircraft, engine industries, and airlines play substantial parts in the program. Major objectives of the studies include the making of conceptual layouts of new subsonic transport aircraft incorporating projected advances and the identification of the potential benefits and costs of the technology advances. Another goal is the definition of the ground and flight research activities required to bring the advanced technologies to a state of readiness for industry use by the late 1970s.
    Keywords: AIRCRAFT
    Type: Astronautics and Aeronautics; 10; Aug. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Flexible wings for transportation. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The possible uses of flexible wings for transportation of passengers and cargo from point to point on earth are discussed along with emergency applications of flexible wings in connection with conventional aircraft. Topics considered include gliding and soaring as a sport, towing of flexible-wing gliders for cargo delivery, powered flight with small aircraft having folding flexible wings, aerial dropping of personnel and cargo on flexible wings instead of parachutes, landing and recovery of rocket payloads by means of flexible wings, and use of flexible wings with ejection seats and as an emergency landing system for conventional aircraft.
    Keywords: AIRCRAFT
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Nonlinear instability of a helicopter blade. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The nonlinear equations of flap-lag coupled with oscillation of a torsionally rigid blade are derived. The solution is established by a simplified asymptotic expansion procedure of multiple time scales. The region of stability and limit cycle oscillation and its comparison with numerical results are presented.
    Keywords: AIRCRAFT
    Type: AIAA PAPER 72-956 , American Institute of Aeronautics and Astronautics, Atmospheric Flight Mechanics Conference; Sept. 11-13, 1972; Palo Alto, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Noise radiation from V/STOL aircraft. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: This paper presents a detailed evaluation of design factors affecting noise annoyance by V/STOL aircraft. Community noise annoyance is quantified on the basis of recent analyses of survey data, and the implications on V/STOL design discussed. The effect of fundamental design choices on noise levels is analysed. The principal noise sources, and therefore the optimum noise control measures, are a function of disc loading. It is found that increase in rotor scale gives a substantial benefit in subjective levels at the lower disc loadings. Rotor noise source mechanisms are discussed in detail and the dominant effect of the unsteady aerodynamic input to the rotor demonstrated. Data on the effects of recirculation on noise is presented. Two approaches for low noise V/STOL seem to be feasible. These are the low disc loading open rotor, and a ducted fan with substantial duct attenuation treatment. The principal noise control methods for each approach are given.
    Keywords: AIRCRAFT
    Type: ICAS PAPER 72-22 , International Council of the Aeronautical Sciences, Congress; Aug. 28, 1972-Sept. 2, 1972; Amsterdam; Netherlands
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Analytic prediction of aircraft spin characteristics and analysis of spin recovery. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Keywords: AIRCRAFT
    Type: AIAA PAPER 72-985 , American Institute of Aeronautics and Astronautics, Atmospheric Flight Mechanics Conference; Sept. 11-13, 1972; Palo Alto, CA
    Format: text
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    NASA TECHNICAL REPORTS
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