Results 161 to 170 of about 84,328 (206)

Aerodynamics –Drag

2008
Abstract The aerodynamics of golf balls is an intriguing subject and, as we shall see, it holds several surprises. The most obvious effect of the air on the flight of the ball arises when there is a strong wind. A side wind can turn a shot aimed at the fairway into a search for the ball in the rough grass.
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Reduction of Aerodynamic Drag

1981
Abstract : A study is being made of the effect on aerodynamic drag of boundary layer irradiation by radioactive sources. A blow-down wind tunnel and a skin friction drag balance have been designed and constructed. The balance is of the null-position type, and is operated using an automatic control system to maintain the null position of the drag plate.
J. Clark, W. G. Rees, W. A. Wilby, J. E. Field   +3 more
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Aerodynamic Drag of Streamers, Parafoils and Loops

43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005
The drag and flapping characteristics of aerodynamic decelerators in a low speed flow are considered. Streamers, parafoils and loops were investigated. These systems had combinations of areas 0.025 m2, 0.05 m 2, 0.075 m2 and aspect-ratios 3.3, 10, 20, 30. A total of 12 models for each arrangement was tested.
Carruthers, A. C., Filippone, A.
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Aerodynamic drag in cycling: methods of assessment

Sports Biomechanics, 2011
When cycling on level ground at a speed greater than 14 m/s, aerodynamic drag is the most important resistive force. About 90% of the total mechanical power output is necessary to overcome it. Aerodynamic drag is mainly affected by the effective frontal area which is the product of the projected frontal area and the coefficient of drag.
Pierre, Debraux, Frederic, Grappe, Aneliya V, Manolova, William, Bertucci   +3 more
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Aerodynamic Drag Reduction of Intercity Buses

SAE Technical Paper Series, 1980
<div class="htmlview paragraph">An experimental program was conducted to verify the reduction in fuel consumption achievable with aerodynamic improvements to intercity buses. Wind tunnel model tests were used to develop effective aerodynamic improvements and full-scale road tests to validate the results. Greyhound Lines coach models MC-7 and MC-8
Alan T. McDonald, George M. Palmer
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Aerodynamic drag reduction of goods trains

Journal of Wind Engineering and Industrial Aerodynamics, 1992
Abstract Tests on one-tenth scale hopper and gondola rail cars have been undertaken in a closed-circuit wind tunnel with a fixed floor. By varying the number of wagons in the train length, it was concluded that simulation of a typical wagon away from end effects (i.e.
S. Watkins, J.W. Saunders, H. Kumar
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Prediction of Aerodynamic Drag.

1984
Abstract : Drag prediction is the most important and challenging problem in aerodynamics. Experimental, empirical, analytical and numerical approaches, singly and in concert, have addressed this problem with varying degrees of success (and notable failures).
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The aerodynamic drag of grassland

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1950
An improvised drag-plate apparatus, on the principle of that used by Sheppard (1947) on a concrete surface, but suitably modified in design, has been used for exploratory measurements of the aerodynamic drag of grassland. The grass cover was variable (1 to 15 cm.
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Aerodynamic Drag on Vehicles in Tunnels

Journal of Basic Engineering, 1969
The purpose of this study was to investigate the aerodynamic drag on vehicles moving in guideways of varying degrees of enclosure. The reason for this study was that several potential high speed ground transport system concepts involve high speed motion of vehicles in enclosed guideways for significant portions of their travel time.
S. William Gouse, B. S. Noyes, J. K. Nwude, M. C. Swarden   +3 more
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Aerodynamic drag of mountain bike tyres

Sports Engineering, 2001
This paper proposes the concept of a front wheel air deflector for downhill mountain bikes. Downhill mountain bike tyres are becoming larger with more aggressive tread patterns in order to cope with the increasingly severe conditions of modern downhill courses, which in turn leads to increased aerodynamic drag forces caused by air flow, and ...
R. J. Sunter, A. T. Sayers
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