wobbling disk
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disk engine — noun : any of various rotary engines in which the piston or its equivalent is a rotating or wobbling disk … Useful english dictionary
Euler's disk — Euler s disk, named after Leonhard Euler, is a circular disk that spins, without slipping, on a surface. The canonical example is a coin spinning on a table. It is universally observed that a spinning Euler s disk ultimately comes to rest; and it … Wikipedia
precession — precessional, adj. /pree sesh euhn/, n. 1. the act or fact of preceding; precedence. 2. Mech. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the… … Universalium
Spoke — A spoke is one of some number of rods radiating from the center of a wheel (the hub where the axle connects), connecting the hub with the round traction surface. The term originally referred to portions of a log which had been split lengthwise… … Wikipedia
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
Extraterrestrial skies — The sky of a world refers to the view of the heavens from its surface. This view varies from world to world for many reasons. The most important factor in the appearance of a world s sky is its atmosphere, or the lack thereof. Depending on the… … Wikipedia
Cycloidal drive — For the marine propulsion system, see Voith Schneider. A cycloidal drive or cycloidal speed reducer is a mechanism for reducing the speed of an input shaft by a certain ratio. Cycloidal speed reducers are capable of high ratios in compact sizes.… … Wikipedia
Nutating disc engine — A nutating disc engine (also sometimes called a disc engine) is an internal combustion engine comprising fundamentally of one moving part and a direct drive onto the crankshaft. Initially patented in 1993, it differs from earlier internal… … Wikipedia
Nutation — See also: Nutation in plants Rotation (green), Precession (blue) and Nutation in obliquity (red) of the Earth Nutation (from Latin: nūtāre, to nod) is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric… … Wikipedia
Darts — This article is about the pub game. For the British pop band, see Darts (band). For other meanings, see Dart (disambiguation). Darts Darts in a dartboard Highest governing body WDF First played … Wikipedia
