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  • 1
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    A comparison of full-scale X-15 lift and drag characteristics with wind-tunnel results and theory (1961)
    In:  CASI
    Details
    Publication Date: 2004-12-22
    Keywords: unknown
    Type: RES.-AIRPLANE-COMM. REPT. ON CONF. ON THE PROGR. OF THE X-15 PROJ. 1961; P 83-98
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Review of drag measurements from flight tests of manned aircraft with comparisons to wind-tunnel predictions (1973)
    In:  CASI
    Details
    Publication Date: 2011-10-14
    Description: In-flight studies of the overall and local components of drag of many types of aircraft were conducted. The primary goal of these studies was to evaluate wind-tunnel and semiempirical prediction methods. Some evaluations are presented in this paper which may be summarized by the following observations: Wind-tunnel predictions of overall vehicle drag can be accurately extrapolated to flight Reynolds numbers, provided that the base drag is removed and the boattail areas on the vehicle are small. The addition of ablated roughness to lifting body configurations causes larger losses in performance and stability than would be expected from the added friction drag due to the roughness. Successful measurements of skin friction have been made in flight to Mach numbers above 4. A reliable inflatable deceleration device was demonstrated in flight which effectively stabilizes and decelerates a lifting aircraft at supersonic speeds.
    Keywords: AERODYNAMICS
    Type: AGARD Aerodyn. Drag; 12 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Reduced truck fuel consumption through aerodynamic design (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Full-scale fuel consumption and drag tests were performed on a conventional cab-over-engine tractor-trailer combination and a version of the same vehicle with significant forebody modifications. The modified configuration had greatly increased radii on all front corners and edges of the tractor and a smooth fairing of the modified tractor top and sides extending to the trailer. Concurrent highway testing of the two configurations showed that the modified design used 20% to 24% less fuel than the baseline configuration at 88.5 km/hr (55 mph) with near-calm wind conditions. Coastdown test results showed that the modified configuration reduced the drag coefficient by 0.43 from the baseline value of 1.17 at 88.5 km/hr (55 mph) in calm wind conditions.
    Keywords: URBAN TECHNOLOGY AND TRANSPORTATION
    Type: Journal of Energy; 1; Sept
    Format: text
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  • 4
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    Reduction of aerodynamic drag and fuel consumption for tractor-trailer vehicles (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Wind-tunnel tests were performed on a scale model of a cab-over-engine tractor-trailer vehicle and several modifications of the model. Results from two of the model configurations were compared with full-scale drag data obtained from similar configurations during coast-down tests. Reductions in fuel consumption derived from these tests are presented in terms of fuel quantity and dollar savings per vehicle year, based on an annual driving distance of 160,900 km (100,000 mi.). The projected savings varied from 13,001 (3435) to 25,848 (6829) liters (gallons) per year which translated to economic savings from $3435 to about $6829 per vehicle year for an operating speed of 88.5 km/h (55 mph) and wind speeds near the national average of 15.3 km/h (9.5 mph). The estimated cumulative fuel savings for the entire U.S. fleet of cab-over-engine tractor, van-type trailer combinations ranged from 4.18 million kl (26.3 million bbl) per year for a low-drag configuration to approximately twice that amount for a more advanced configuration.
    Keywords: URBAN TECHNOLOGY AND TRANSPORTATION
    Type: Journal of Energy; 3; Sept
    Format: text
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  • 5
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    Use of a pitot probe for determining wing section drag in flight (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A wake traversing probe was used to obtain section drag and wake profile data from the wing of a sailplane. The transducer sensed total pressure defect in the wake as well as freestream total pressure on both sides of the sensing element when the probe moved beyond the wake. Profiles of wake total pressure defects plotted as a function of distance above and below the trailing edge plane were averaged for calculating section drag coefficients for flights at low dynamic pressures.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: Kansas Univ. Proc. of the NASA, Ind., Univ., Gen. Aviation Drag Reduction Workshop; p 171-189
    Format: application/pdf
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  • 6
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    IN-FLIGHT GAINS REALIZED BY MODIFYING A TWIN SIDE-INLET INDUCTION SYSTEM (1957)
    In:  CASI
    Details
    Publication Date: 2019-05-11
    Description: Modification of twin side-inlet induction system and in-flight gains
    Keywords: AIRCRAFT
    Type: NACA-RM-H57J09
    Format: application/pdf
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  • 7
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    Comparison of Full-scale Lift and Drag Characteristics of the X-15 Airplane with Wind-tunnel Results and Theory (1962)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Aerodynamic lift and drag characteristics comparison between full scale and wind tunnel model of X-15 aircraft
    Keywords: AERODYNAMICS
    Type: NASA-TM-X-713
    Format: application/pdf
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  • 8
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    Summary of full-scale lift and drag characteristics of the X-15 airplane (1966)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Full-scale power-off flight lift and drag characteristics of X-15 aircraft
    Keywords: AERODYNAMICS
    Type: NASA-TN-D-3343
    Format: application/pdf
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  • 9
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    Improved Cattle Hauler (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Better aerodynamics and ventilation increases fuel efficiency and decreases shipping losses. Trailer is ventilated and cooled by inlet ports in front of rig and outlet ports in middle and rear. Rounded cab and fairing reduce drag by creating an attached airflow.
    Keywords: PHYSICAL SCIENCES
    Type: FRC-11058 , NASA Tech Briefs (ISSN 0145-319X); 7; 3; P. 265
    Format: text
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  • 10
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    Low-drag ground vehicle particularly suited for use in safely transporting livestock (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A low-drag truck consisting of a tractor-trailer rig characterized by a rounded forebody and a protective fairing for the gap conventionally found to exist between the tractor and the trailer is described. The fairing particularly suited for establishing an attached flow of ambient air along its surfaces. The truck is also comprised of a forward facing, ram air inlet and duct and a plurality of submerged inlets and outflow ports communicating with the trailer for continuously flushing heated gases from the trailer as the rig is propelled at highway speeds.
    Keywords: URBAN TECHNOLOGY AND TRANSPORTATION
    Format: application/pdf
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