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[full citation needed] Amazon allgedly deleted negative reviews of Scientology-related items, despite the reviews' compliance with comments guidelines. [364] [365] In November 2012, it was reported that Amazon.co.uk deleted "a wave of reviews by authors of their fellow writers' books in what is believed to be a response to [a] 'sock puppet ...
The RMS Quad Cane’s 4.4-star rating across 6,500 Amazon reviews says it all. Its extra-wide, four-prong base makes it exceptionally stable. ... This solid wood walking stick from Brazos ranges ...
For a given weight, a helicopter with shorter rotors will have higher disk loading, and will require more engine power to hover. A low disk loading improves autorotation performance in rotorcraft . [ 5 ] [ 6 ] Typically, an autogyro (or gyroplane) has a lower rotor disk loading than a helicopter, which provides a slower rate of descent in ...
Blisks generally have better aerodynamics than conventional rotors with single blades and are lighter. They may be additively manufactured, integrally cast, machined from a solid piece of material, or made by welding individual blades to a rotor disk. The term is used mainly in aerospace engine design.
The solid core of the rotor is built with stacks of electrical steel laminations. The figure shows one of many lamination sets used. The rotor lamination has a larger number of slots than its corresponding stator lamination, and the number of rotor slots should be a non-integer multiple of the number of stator slots to prevent magnetic ...
Rotor solidity is a dimensionless quantity used in design and analysis of rotorcraft, propellers and wind turbines.Rotor solidity is a function of the aspect ratio and number of blades in the rotor and is widely used as a parameter for ensuring geometric similarity in rotorcraft experiments.
The classical linear rotor consists of two point masses and (with reduced mass = +) at a distance of each other. The rotor is rigid if is independent of time. The kinematics of a linear rigid rotor is usually described by means of spherical polar coordinates, which form a coordinate system of R 3.
Although the concept took over three years to refine, the NOTAR system is simple in theory and works to provide some directional control using the Coandă effect. [2] [3] A variable pitch fan is enclosed in the aft fuselage section immediately forward of the tail boom and driven by the main rotor transmission.
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