Aerocrane: A hybrid LTA aircraft for aerial crane applications [PDF]
, 1975 The Aerocrane, a hybrid aircraft, combines rotor lift with buoyant lift to offer VTOL load capability greatly in excess of helicopter technology while eliminating the airship problem of ballast transfer. In addition, the Aerocrane concept sharply reduces
Doolittle, D. B., Perkins, R. G., Jr.
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Design of a Versatile, Teleoperable, Towable Lifting Machine with Robotic Capabilities for Use in Nasa's Lunar Base Operations [PDF]
The lifting machine will assist in lifting cargo off of landers sent to the Moon and in the construction of a lunar base. Three possible designs were considered for the overall configuration of the lifting machine: the variable angle crane, the tower ...
Harris, Elizabeth +2 more
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Developments to Increase the Performance, Operational Versatility and Automation of a Lunar Surface Manipulation System [PDF]
, 2009 The objective of this paper is to describe and summarize the results of the development efforts for the Lunar Surface Manipulation System (LSMS) with respect to increasing the performance, operational versatility, and automation.
Doggett, William R. +5 more
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Investigation of dynamic loads in the lifting mechanism of gantry cranes «SOKIL »
Herald of the Odessa National Maritime UniversityIn this paper, we study the dynamic loads acting on the ropes of the SOKIL portal crane lifting drive during the overload of forest logs according to the «warehouse-ship» scheme in a river port. An electrotensometric method was used to analyze the nature of changes in dynamic forces in the drive elements.
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U.S. Coast Guard Boat Recovery Simulation at NASA Ames Vertical Motion Simulator [PDF]
The Boat Recovery Simulation was a collaboration between the U.S. Coast Guard and NASA. The experiment was conducted at the NASA Ames Vertical Motion Simulator (VMS).
Chung, William W. +3 more
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Strength of Materials and Theory of StructuresIncreasing the productivity of jib cranes is an urgent problem of improving their operation. Combining the work of separate mechanisms is one of the ways to increase the productivity of jib cranes. The aim of the study is to build a mathematical model and conduct a dynamic analysis of the crane jib system with simultaneous operation of the derricking ...
Viacheslav Loveikin +4 more
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Design and Field Test of a Mass Efficient Crane for Lunar Payload Handling and Inspection: The Lunar Surface Manipulation System [PDF]
, 2008 Devices for lifting, translating and precisely placing payloads are critical for efficient Earthbased construction operations. Both recent and past studies have demonstrated that devices with similar functionality will be needed to support lunar outpost ...
Doggett, William R. +4 more
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Mechanics And Mathematical MethodsThe fundamental analysis and optimization (minimization) of dynamic loads in elastic elements (ropes) of load lifting mechanisms of cranes used in urban development is carried out. The basis of the analysis and methodology of optimization of motion modes of the mentioned mechanisms is the approach implemented in the classical calculus of variations ...
Yu. Chovniuk +4 more
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Design and construction of a practical and portable household lifting-aid for the physically impaired [PDF]
, 2008 Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.Includes bibliographical references (p. 40).TV's to mini-fridges, the design of a hand operated lift, to be lightweight and easily disassembled, 200 lbs max ...
Sanz, Gregory L. B
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Realization of energy-saving control modes on cranes of great load-carrying capacity [PDF]
, 1998 Saving energy is highly important for all types of lifting machinery. Research shows that it is possible to reduce energy consumption in mechanism drives at all stages of movement.
Grygorov, О. V. +3 more
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