Results 51 to 60 of about 160,252 (187)
Scientific Reports, 2023 The rules governing the dimensions of the Javelin were substantially changed in 1986. It was considered that this new design guaranteed there was zero pitching moment at 0° angle of attack and that the pitching moment decreased (became negative) with ...
Kazuya Seo +5 more
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Sensors, 2012 Baseball and softball pitch types are distinguished by the path and speed of the ball which, in turn, are determined by the angular velocity of the ball and the velocity of the ball center at the instant of release from the pitcher’s hand.
Noel C. Perkins, Ryan S. McGinnis
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A study of the pitching moments and the stability characteristics of monoplanes [PDF]
This note presents a study of the pitching moments and the stability characteristics of monoplanes. Expressions for the pitching-moment coefficient and the Diehl stability coefficient for the monoplane are developed, suitable for the use of airplane ...
Higgins, George J
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Three-Dimensional Navier-Stokes Simulation of Space Shuttle Main Propulsion 17-inch Disconnect Valves [PDF]
, 1991 A steady incompressible three-dimensional viscous flow analysis has been conducted for the Space Shuttle external tank/orbiter propellant feed line disconnect flapper valves with upstream elbows.
Kandula, M., Pearce, D. G.
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Computational Fluid Dynamics Study on the Aerodynamics of a Blended Wing Body with Ground Effect in Subsonic Conditions [PDF]
Journal of Applied Fluid MechanicsBlended Wing Body (BWB) aircraft designs have garnered significant interest due to their potential for improved aerodynamic efficiency, particularly during critical phases of flight such as landing and take-off.
S. Mohan, P. Kumar
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Control of rotorcraft retreating blade stall using air-jet vortex generators [PDF]
, 2006 A series of low-speed wind tunnel tests were carried out on an oscillating airfoil fitted with two rows of air-jet vortex generators (AJVGs). The airfoil used had an RAE 9645 section and the two spanwise arrays of AJVGs were located at x/c=0.12 and 0.62.
Akanni S. D. +22 more
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EnergiesThis study applied a hybrid pitching motion for an oscillating wing with a leading flap aimed at enhancing energy extraction efficiency. In the first half of the cycle, the hybrid pitching motion begins with a non-sinusoidal pitching motion for 0.0 ≤ t/T
Suleiman Saleh, Chang-Hyun Sohn
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Prediction of nacelle aerodynamic interference effects at low supersonic Mach numbers [PDF]
The accuracy of analytical predictions of nacelle aerodynamic interference effects at low supersonic speeds are studied by means of test versus theory comparisons.
Kulfan, R. M.
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Fundamental study on a thin-film ae sensor for measurement of behavior of a multi-pad contact slider [PDF]
, 1996 To study the fundamental dynamic characteristics of a multi-pad slider for contact recording, we developed a thin-film piezoelectric acoustic emission array sensor on an Si-suspension with an array pattern similar to that of contact pads.
Burger, G.J. +3 more
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Prediction of wing aeroelastic effects on aircraft lift and pitching moment characteristics [PDF]
The distribution of flight loads on an aircraft structure determine the lift and pitching moment characteristics of the aircraft. When the load distribution changes due to the aeroelastic response of the structure, the lift and pitching moment ...
Eckstrom, Clinton V.
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