Topic
Blade pitch
About: Blade pitch is a research topic. Over the lifetime, 5321 publications have been published within this topic receiving 63134 citations.
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42 citations
TL;DR: In this paper, the reduction of tip vortices in aircraft propellers is discussed, where a fence having anhedral or dihedral is attached to the blades of the propeller.
Abstract: The invention concerns reduction of tip vortices in aircraft propellers, wherein a fence having anhedral or dihedral is attached to the blades of the propeller. Another form of the invention is applicable to counterrotating propeller systems, wherein a fence is attached to the blades of the forward propeller of the system, and no fences are attached to the aft propeller.
42 citations
Patent•
03 Mar 1983
TL;DR: In this article, a ship's propulsion system which is driven from a main machine, preferably a Diesel engine or a gas or steam turbine, and consists of a main propeller and a fixedly installed tandem propeller between the main machine and the rudder, is characterized, where a part of the total mechanical output is taken off by a synchronous generator arranged at the end face or in the shafting.
Abstract: 1. Ship's propulsion system which is driven from a main machine, preferably a Diesel engine or a gas or steam turbine, and consists of a main propeller and a fixedly installed tandem propeller between main propeller and rudder or of a main propeller and a rudder which is constructed as active rudder with or without jet or as a pivotable propeller with of without gear nacelle and which for improvement of the overall propulsion efficiency and the rudder effect permanently corotates as counterpropeller, characterized thereby, that a part of the total mechanical output is taken off by a synchronous generator (5) arranged at the end face of the main machine (2) or in the shafting (3) and conducted by way of an electrical shaft to a polyphase alternating current motor which drives the tandem propeller (6, 16), that the generator (5), during starting and reversing and in derivation from the travel command generator signal, receives shock excitation until the polyphase alternating current motor has started or reversed and the excitation is regulated towards U/f = constant.
42 citations
TL;DR: In this article, a performance assessment of the MCP models used to date and of newly proposed models is undertaken in this paper and the models and the regression techniques used in them were applied to the mean hourly wind speeds and directions and air densities recorded in 2014 at ten weather stations in the Canary Archipelago (Spain).
42 citations
Patent•
17 Nov 1998TL;DR: In this article, a rotor with integrated blading is described for a propulsion unit on which rotor blades are arranged circumferentially and extend in an essentially radial manner. And the rotor blades include a metallic blade footing, a metallic pan section, and a fiber reinforced plastic pan.
Abstract: The invention relates to a rotor with integrated blading, especially for a propulsion unit on which rotor blades are arranged circumferentially and extend in an essentially radial manner. In order to reduce vibrations, the rotor blades comprise a metallic blade footing, a metallic blade pan section, said section at least constructing a part of the blade fore-edge and the area of the blade surface which is adjacent to said blade fore-edge, and a blade pan made of fiber reinforced plastic.
42 citations