The Influence of Wheel Spin-up on Landing-gear Impact

The Influence of Wheel Spin-up on Landing-gear Impact
Author: W. Flügge
Publisher:
Total Pages: 107
Release: 1954
Genre: Airplanes
ISBN:

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The possibilities of an eccentric wheel and of an inclined shock strut have been considered. In both cases the computation is rather involved. The binding of the piston due to ovalization of the shock strut cylinder does not seem to present a serious problem.

Theoretical and Analog Studies of the Effects of Nonlinear Stability Derivatives on the Longitudinal Motions of an Aircraft in Response to Step Control Deflections and to the Influence of Proportional Automatic Control

Theoretical and Analog Studies of the Effects of Nonlinear Stability Derivatives on the Longitudinal Motions of an Aircraft in Response to Step Control Deflections and to the Influence of Proportional Automatic Control
Author: Benjamin Milwitzky
Publisher:
Total Pages: 348
Release: 1955
Genre: Aeronautics
ISBN:

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Report

Report
Author: United States. National Advisory Committee for Aeronautics
Publisher:
Total Pages: 44
Release: 1955
Genre: Aeronautics
ISBN:

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An Overview of Landing Gear Dynamics

An Overview of Landing Gear Dynamics
Author: Jocelyn I. Pritchard
Publisher:
Total Pages: 22
Release: 1999
Genre: Aerodynamics
ISBN:

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On of the problems facing the aircraft community is landing gear dynamics, especially shimmy and brake-induced vibration. Shimmy and brake-induced vibrations can lead to accidents due to excessive wear and shortened life of gear parts and contribute to pilot and passenger discomfort. To increase understanding of these problems, a literature survey was performed. The major focus is on work from the last ten years. Some older publications are included to understand the longevity of the problem and the background from earlier researchers. The literature survey includes analyses, testing, modeling, and simulation of aircraft landing gear; and experimental validation and characterization of shimmy and brake-induced vibration of aircraft landing gear. The paper presents an overview of the problem, background information, and a history of landing gear dynamics problems and solutions. Based on the survey an assessment and recommendations of the most critically needed enhancements to the state of the art will be presented. The status of Langley work contributing to this activity will be given.

Technical Note

Technical Note
Author:
Publisher:
Total Pages: 490
Release:
Genre: Aeronautics
ISBN:

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A Study of Analytic Modeling Techniques for Landing Gear Dynamics

A Study of Analytic Modeling Techniques for Landing Gear Dynamics
Author:
Publisher:
Total Pages: 86
Release: 1982
Genre: Aircraft
ISBN:

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The ability to accurately predict the dynamic response of an aircraft while it is operating in the taxi mode depends, in part on the correct modeling of the dynamic characteristics of the landing gear system. Traditionally, landing gear have been designed to absorb landing impact ('shock absorber') and their characteristics during periodic, oscillatory response ('spring') have been considered as secondary. With the increased emphasis on the rough or damaged field taxi operation, there is a requirement to determine the best methods for modeling the gear system. This report documents a brief review of the state of the art of gear modeling. A study was then conducted to evaluate important model parameters, using a simple cantilevered gear computer simulation. Also included is the development of a technique for the experimental determination of important gear system parameters. (Author).