Results 61 to 70 of about 5,948 (253)
Dynamics of a split torque helicopter transmission [PDF]
, 1992 A high reduction ratio split torque gear train has been proposed as an alternative to a planetary configuration for the final stage of a helicopter transmission. A split torque design allows a high ratio of power-to-weight for the transmission.
Krantz, Timothy, Rashidi, Majid
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Aspects of geometric calculation of the planetary gear train with intermediate rollers. Part 1 [PDF]
, 2016 The paper presents the geometric calculation of the planetary gear train with intermediate rollers, where the number of intermediate rollers is greater or less than that of the teeth in the annular gear by one, the profile surface of the annular gear ...
An I-Kan +2 more
core +1 more source
Den attendance by Arctic foxes experiencing 10 years of increasing tourism
Wildlife Biology, EarlyView.Wildlife tourism is a growing industry, and an increasing number of people seek to observe and interact with wild animals in their natural surroundings. In Iceland, the native Arctic fox Vulpes lagopus is widespread and has been under heavy hunting pressure for centuries.
Ester Rut Unnsteinsdóttir +2 more
wiley +1 more source
Vibration in Planetary Gear Systems with Unequal Planet Stiffnesses [PDF]
An algorithm suitable for a minicomputer was developed for finding the natural frequencies and mode shapes of a planetary gear system which has unequal stiffnesses between the Sun/planet and planet/ring gear meshes.
August, R., Frater, J. L., Oswald, F. B.
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On Crossley's contribution to the development of graph based algorithms for the analysis of mechanisms and gear trains [PDF]
, 2015 This paper celebrates a particular branch of Crossley's early work dedicated to Mechanism Science, which deals with a rigorous introduction of Graph Theory to the study of some fundamental and intrinsic properties of kinematic chains and mechanisms ...
Belfiore, N, Pennestrì, E
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Hunting and fishing harvest data collection: a horizon scanning exercise from the French context
Wildlife Biology, EarlyView.Legal and societal moves increasingly lead leisure hunting and fishing practitioners to record their harvest. The total number of individuals harvested per population per year is the minimum required information to feed into demographic models and allow science‐based management. Some few schemes record more detailed data, hence allowing better‐informed
Matthieu Guillemain +17 more
wiley +1 more source
Reliability model for planetary gear [PDF]
A reliability model is presented for planetary gear trains in which the ring gear is fixed, the Sun gear is the input, and the planet arm is the output.
Coy, J. J., Paridon, C. A., Savage, M.
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Collaborating in future states—Contextual instability, paradigmatic remaking, and public policy
Australian Journal of Public Administration, EarlyView.Abstract Collaboration is ubiquitous in public policy life, with its presence and profile determined by prevailing governance conditions. Commitments to globalisation and marketisation in the latter part of the 20th century marked the onset of an era defined by collaboration, between and across tiers and spheres of government, with non‐state actors ...
Helen Sullivan
wiley +1 more source
Life and reliability models for helicopter transmissions [PDF]
Computer models of life and reliability are presented for planetary gear trains with a fixed ring gear, input applied to the sun gear, and output taken from the planet arm.
Coy, J. J., Knorr, R. J., Savage, M.
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Hybrid geared traction transmissions [PDF]
, 1983 The basic configuration of geared traction drives, geometric and structural factors to be considered in their construction, and current work on hybrid helicopter transmissions rated at 500 and 3000 hp are ...
Nasvytis, A. L., White, G.
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