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A rack and pinion is a type of linear actuator that comprises a circular gear (the pinion) engaging a linear gear (the rack ). [1] Together, they convert between rotational motion and linear motion: rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate.
Unangan hunting headgear. QayaatX̂uX̂, a closed-crown chief's hat from the Arvid Adolf Etholén Collection, National Museum of Finland, Helsinki. Unangan hunting headgear are wooden hats associated with the Unangan or Unangas, the Indigenous peoples of what are currently known as the Aleutian Islands . Also known as bentwood hats, and hunting ...
Timing belt (camshaft) In a piston engine, either a timing belt (also called a cambelt) or timing chain or set of timing gears is a perishable component used to synchronize the rotation of the crankshaft and the camshaft. This synchronisation ensures that the engine's valves open and close at the correct times in relation to the position of the ...
A gear stick (rarely spelled gearstick ), [1] [2] gear lever (both UK English ), gearshift or shifter (both U.S. English ), more formally known as a transmission lever, is a metal lever attached to the transmission of an automobile. The term gear stick mostly refers to the shift lever of a manual transmission, while in an automatic transmission ...
Linkage (mechanical) Variable stroke engine (Autocar Handbook, Ninth edition) A mechanical linkage is an assembly of systems connected so as to manage forces and movement. The movement of a body, or link, is studied using geometry so the link is considered to be rigid. [1] The connections between links are modeled as providing ideal movement ...
Hydraulic pump. A hydraulic pump is a mechanical source of power that converts mechanical power into hydraulic energy ( hydrostatic energy i.e. flow, pressure). Hydraulic pumps are used in hydraulic drive systems and can be hydrostatic or hydrodynamic. They generate flow with enough power to overcome pressure induced by a load at the pump outlet.
Wingtip devices help prevent the flow around the wingtip of higher pressure air under the wing flowing to the lower pressure surface on top at the wingtip, which results in a vortex caused by the forward motion of the aircraft. Winglets also reduce the lift-induced drag caused by wingtip vortices and improve lift-to-drag ratio.
William Ben Hogan (August 13, 1912 – July 25, 1997) was an American professional golfer who is generally considered to be one of the greatest players in the history of the game. [1] He is notable for his profound influence on golf swing theory, inventing the idea of practicing golf [2] and his ball-striking ability.