Results 101 to 110 of about 229,943 (347)
Ṭibb-i Tavānbakhshī, 2012 Background and Aim: Reviewing the literature reveals a possible correlation between the obesity and the potential foot, spine and stability problems. Investigating the important parameters affecting the balance of obese people and prevention from falling
Abbas Rahimi +3 more
doaj
Free-flight investigation of the stability and control characteristics of a STOL model with an externally blown jet flap [PDF]
The stability and control characteristics of a four-engine turbofan STOL transport model having an externally blown jet flap have been investigated by means of the flying-model technique in the Langley full-scale tunnel. The flight characteristics of the
Emerling, S. J. +2 more
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Advanced Engineering Materials, EarlyView.This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar +6 more
wiley +1 more source
VTOL and VSTOL handling qualities specifications, an overview of the current status [PDF]
The highlights of a comparative analysis between the current helicopter and VSTOL specifications and four representative rotary wing aircraft are presented.
Goldstein, K. W.
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Advanced Engineering Materials, EarlyView.In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart +3 more
wiley +1 more source
Experimental study of delta wing leading-edge devices for drag reduction at high lift [PDF]
The drag reduction devices selected for evaluation were the fence, slot, pylon-type vortex generator, and sharp leading-edge extension. These devices were tested on a 60 degree flatplate delta (with blunt leading edges) in the Langley Research Center 7 ...
Johnson, T. D., Jr., Rao, D. M.
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, 1981 An annular wing particularly suited for use in supporting in flight an aircraft characterized by the absence of directional stabilizing surfaces is described.
Walker, H. J.
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On the initial value problem for second order scalar fluctuations in Einstein static
, 2004 We consider fluctuations in a perfect irrotational fluid coupled to gravity in an Einstein static universe background. We show that the homogeneous linear perturbations of the scalar and metric fluctuations in the Einstein static universe must be present
B. Losic +9 more
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Advanced Engineering Materials, EarlyView.Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi +3 more
wiley +1 more source
Flight evaluation of the transonic stability and control characteristics of an airplane incorporating a supercritical wing [PDF]
A TF-8A airplane was equipped with a transport type supercritical wing and fuselage fairings to evaluate predicted performance improvements for cruise at transonic speeds. A comparison of aerodynamic derivatives extracted from flight and wind tunnel data
Gatlin, D. H., Matheny, N. W.
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