Results 261 to 270 of about 11,349 (300)

Suppression of ground resonance in rotorcraft using active landing gear

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2021
This article examines the fundamental aspects of controlling ground resonance in rotorcraft equipped with actively controlled landing gear. Ground resonance is a mechanical instability affecting rotorcraft on the ground. It occurs at certain rotor speeds, where the lead–lag motion of the rotor couples with the motion of fuselage creating a self-excited
Arjun Krishnan, Ashwin Krishnan, Mark Costello   +2 more
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Ground Gears and Transmission Design

SAE Technical Paper Series, 1928
<div class="htmlview paragraph"><b>G</b>ROUND teeth for transmission gears are advocated because they can be made to the same degree of accuracy as the other fine working-parts of a motor-car.</div> <div class="htmlview paragraph">The designing engineer is held responsible for conditions unfavorable to the adoption of gear
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OIL-TREATED STEEL AND GROUND GEARS

SAE Technical Paper Series, 1924
<div class="htmlview paragraph">The Cadillac Company has used S.A.E. 3250 steel for at least 8 years. This is medium nickel-chromium steel. Many other kinds have also been tried. Experience has shown that transmission gears made of carburized steel are not within 30 per cent as accurate as those made of oil-treated steel.
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Design of a landing gear system for UAV in complex ground environments

Applied and Computational Engineering, 2023
The current UAV technology is developing rapidly and there are various UAV concepts such as hybrid vertical take-off and landing (VTOL) UAV in addition to traditional UAV. The main solution direction of these UAV concepts lies in the compatibility of vertical take-off and landing and long endurance and high load.
Nan An, Jipeng Liu, Ziqi Zhou
openaire   +1 more source

Research on control strategy for ground extension and retraction test of landing gear

2020 5th International Conference on Automation, Control and Robotics Engineering (CACRE), 2020
During take-off and landing of airplanes, landing gear control system features have huge influence on airplane safety. In this paper, Labview software, a virtual instrument from National Instruments Corporation is used as a development platform to apply its powerful G language programming ablity and friendly program design interface to develop system ...
Linhai Zhang, Yeming Yao, Lilin Xu
openaire   +1 more source

Determining Ground Winds for Gear-on-the-Ground Accidents Using FDR Data

AIAA Modeling and Simulation Technologies Conference, 2011
On December 20, 2008, Continental Airlines flight 1404, a Boeing 737-500, departed the left side of runway 34R at Denver International Airport, Denver, Colorado, while attempting to take off, resulting in 6 serious and 41 minor injuries. To investigate the Continental flight 1404 takeoff accident, it was necessary to determine the winds acting on the ...
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Analysis of efficiency of spur ground gears and the influence of running-in

Tribology International, 2016
High-performing gear transmissions are needed to reduce CO2 emissions. In this paper an FZG gear test rig was used to investigate how two running-in loads affects the gear mesh efficiency for two d ...
S. Sjöberg, M. Sosa, M. Andersson, U. Olofsson   +3 more
openaire   +1 more source

Gear-Shift Robots For Proving Grounds

Vehicle Dynamics International
Stähle offers a range of gear-shift robots to enable repeatable tests on proving grounds
openaire   +1 more source

Technical and economic feasibility of low ground pressure running gear

Soil and Tillage Research, 1995
Abstract To reduce the environmental impact of traffic-induced overcompaction of soils, on-farm solutions are needed. The use of low ground pressure field traffic systems is a rational way to manage soil compaction. The adoption of such systems by farmers strongly depends on their technical feasibility and the costs involved in their implementation ...
Tijink, F.G.J., Döll, H., Vermeulen, G.D.   +2 more
openaire   +2 more sources

Elastohydrodynamic response of transverse ground gear teeth

2002
Abstract The paper presents numerical results for the elastohydrodynamic lubrication of gear teeth taking their real surface roughness profiles into account. The conditions examined have surface roughness features that are large compared to the EHL film thickness.
openaire   +1 more source