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Babolat's current tennis racquet line-up includes Pure Drive, a power-oriented racquet used by players such as Carlos Moyá, Kim Clijsters, Andy Roddick and Li Na, Pure Aero (formerly AeroPro Drive), known for its spin potential and usage by Rafael Nadal, Caroline Wozniacki and Carlos Alcaraz, and Pure Strike, a control-oriented racquet used by players such as Dominic Thiem.
Two bladed spinner on a wire wheel 1967 AMC simulated wire wheel cover with spinner. The spinner or "knock-off" originated with Rudge-Whitworth center lock wire wheels and hubs, which were first patented in 1908. [1] [2] The spinner was a threaded, winged nut designed to keep the wheel fastened to the hub. They were screwed on and "knocked on ...
In aerospace engineering, spin stabilization is a method of stabilizing a satellite or launch vehicle by means of spin, i.e. rotation along the longitudinal axis. The concept originates from conservation of angular momentum as applied to ballistics , where the spin is commonly obtained by means of rifling .
The greatest effort is required from a locomotive when starting. At this time, if the engineer applies too much power to the wheels (i.e., for a steam locomotive, the engineer opens the regulator too far) the turning force applied to the wheel will greatly exceed the opposing friction force affected by the surface of the rail, and the wheel will turn without being able to move the train forward.
WHEE-LO is a trademark for a handheld toy that propels a plastic wheel along both sides of a metal track with magnets built into the wheel. As the track is tilted up and down, the wheel rolls the length of the track, top and bottom, and then again on the opposite side of the wire.
A wheeled buffalo figurine—probably a children's toy—from Magna Graecia in archaic Greece [1]. Several organisms are capable of rolling locomotion. However, true wheels and propellers—despite their utility in human vehicles—do not play a significant role in the movement of living things (with the exception of the corkscrew-like flagella of many prokaryotes).