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
More filters
Patent•
03 Aug 1940
TL;DR: In this article, the authors proposed a method to improve the landing gear of a seaplane using inflatable floats, including wing-tip floats for flying, boats, but also applicable for other purposes.
Abstract: This invention relates to improvements in floats and, more particularly, to inflatable floats especially used for the landing gear of seaplanes and the like, inclusive of wing-tip floats for flying, boats, but also applicable for other purposes. One object of this invention is to improve the...
10 citations
Patent•
11 Jun 2014
TL;DR: An unmanned aerial vehicle/unmanned aircraft system including an airframe, a plurality of rotor assemblies, a landing gear, and a flight controller disposed on said airframe is defined in this article.
Abstract: An unmanned aerial vehicle/unmanned aircraft system including an airframe; a plurality of rotor assemblies respectively extending from a plurality of arms connected to said airframe, said rotor assemblies each having a rotor thereon with at least one rotor blade; a landing gear extending from said airframe; and a flight controller disposed on said airframe; wherein said flight controller receives instructions for unmanned aerial vehicle/unmanned aircraft system control.
10 citations
Patent•
05 Jul 2010TL;DR: In this article, the authors described a device for controlling at least one trapdoor (4a, 4b) of the hold of aircraft landing gear, the device comprising a permanent mechanical link (20, 23, 24, 25a, 25b) between the trapdoor and the landing gear.
Abstract: The invention relates to a device for controlling at least one trapdoor (4a, 4b) of the hold of aircraft landing gear, the device comprising a permanent mechanical link (20, 23, 24, 25a, 25b) between the trapdoor and the landing gear. According to the invention, the permanent mechanical link is arranged so as to transform a movement of the landing gear between a stored position and an extended position, or vice versa, into a to-and-fro movement capable of causing the trapdoor to open and then close during the movement of the landing gear between said positions.
10 citations
29 Oct 2015
TL;DR: In this article, a small UAV is modelled and a flight control system suitable for landing on mobile landing platforms is developed using the vortex lattice method, where the aerodynamic properties of the UAV were estimated using the propulsion model and the complete UAV model was validated using data from test flights.
Abstract: Landing on mobile landing platforms could eliminate the need for landing gear. This would particularly benefit high altitude solar UAV, which typically have a very limited payload. Such landings would however require a precise and decoupled control of the UAV’s altitude and speed. In this thesis, a small UAV is modelled, and a flight control system suitable for such landings is developed.
The aerodynamic properties of the UAV were estimated using the vortex lattice method. Propeller performance data was obtained from the manufacturer and used in the propulsion model. The complete UAV model was validated using data from test flights. A comparison of period and damping of the dynamic modes showed a good agreement (<10% error) with the flight data, except for the phugoid damping, which was too low in the model.
The model was used to design two flight control systems, one consisting of three SISO loops for altitude, airspeed and course; and another using a TECS-based controller for airspeed and altitude. Extensive testing in simulation and flight revealed a superior performance of the TECS-based controller, especially in the ability to decouple altitude and airspeed responses.
10 citations