Topic
Landing gear
About: Landing gear is a research topic. Over the lifetime, 3403 publications have been published within this topic receiving 25370 citations. The topic is also known as: landing gear & gear.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a novel take-off and landing system using ground-based power is proposed in the EU-FP7 project GABRIEL, where the main feature of this system is the complete removal of the landing gear from civil aircraft.
Abstract: A novel take-off and landing system using ground-based power is proposed in the EU-FP7 project GABRIEL. The main feature of this system is the complete removal of the landing gear from civil aircraft. The proposed system has the potential to reduce aircraft weight, emissions, and noise. A feasibility study of the structural design of the connection mechanism between aircraft and ground system has been performed by simulating the landing procedure on a moving ground system. One of the key challenges is the landing on a moving ground system under high crosswind conditions. The main focus in the current research is the calculation of the critical dynamic loads on both aircraft and ground system for a wide range of landing conditions (sink rate, velocity differences between aircraft and ground system, etc.). For comparison, conventional landing procedures with a traditional landing (TL) gear have also been simulated. The aerodynamics of the aircraft is represented by an accurate empirical model. The r...
10 citations
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TL;DR: In this paper, a simple analytical model is presented to predict dynamic deflection of a runway pavement at touchdown point caused by a landing gear load during aircraft landing using three independent parameters, modulus of subgrade reaction (ks), contact pressure (p), and vertical component of aircraft velocity (vv).
Abstract: An estimation of the runway pavement deflection during landing for design purposes has been a challenging problem for engineers. This paper presents a simple analytical model to predict dynamic deflection of a runway pavement at touchdown point caused by a landing gear load during aircraft landing. Three independent parameters, modulus of subgrade reaction (ks), contact pressure (p), and vertical component of aircraft velocity (vv), are required to estimate the deflection using this model. This model shows that the dynamic deflection increases with an increase in vertical velocity and contact pressure. These observations follow an expected trend and the field observations made during inspection of the runways. Likewise, the impact factor, which is defined as the ratio of the dynamic deflection to static deflection, also increases with an increase in vertical velocity for a given value of the contact pressure. Irrespective of contact pressure values, the impact factor for zero vertical velocity is ...
10 citations
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19 Jun 1986
TL;DR: In this article, the landing gear mechanism is provided with a relief valve assembly that permits bypass flow at a pre-set pressure drop only during an intermediate portion of the instroke of the landing-gear mechanism to attenuate severe bumps and the like without adversely affecting the controlled infroke and rebound damping.
Abstract: Landing gear mechanism includes a variable area orifice to obtain the desired rebound damping of the landing gear mechanism during landing, and one or more check valve assemblies that operate in conjunction with the variable area orifice to provide the desired controlled instroke of the landing gear mechanism during landing. Also, the landing gear mechanism is provided with a relief valve assembly that permits bypass flow at a pre-set pressure drop only during an intermediate portion of the instroke of the landing gear mechanism to attenuate severe bumps and the like without adversely affecting the controlled instroke and rebound damping of the landing gear mechanism during landing.
10 citations