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Increasing the weight of a helicopter increases disk loading. 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 ...
Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage.
The design also works without a cooling system, saving weight. Compared to turbine based systems, the rotational speed and the rotor-blade temperature of the wave disk engine is lower, which creates lower stress on materials, and consequently less demanding requirements for materials, leading to cheaper manufacturing and maintenance costs. [2]
An actuator disk accelerating a fluid flow from right to left. In fluid dynamics, momentum theory or disk actuator theory is a theory describing a mathematical model of an ideal actuator disk, such as a propeller or helicopter rotor, by W.J.M. Rankine (1865), [1] Alfred George Greenhill (1888) and Robert Edmund Froude (1889).
Helicopter rotor joints Illustration of the shift in the location of the center of mass of a helicopter rotor caused by the individual blades' rotation in their respective vertical joints. Articulated rotor systems with drag hinges allow each blade to advance or lag in its rotation to compensate for the stress on the blade caused by the ...
Crimo video confession admissible A judge has ruled that a video confession given by the man accused of shooting and killing seven people at an Independence Day parade in Highland Park two years ...
Photographer Platon (left) and President-elect Donald Trump at Mar-a-lago on Nov. 25 Credit - Mike Foley. W e are nearing a century of Person of the Year, the franchise TIME’s editors launched ...
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.