A measure of the amount of a curve in the portion of a skate blade that touches the ice. Speed skating blades have little rocker, which makes them faster but less maneuverable. Hockey skates have a great deal of rocker, allowing greater maneuverability.
the curve along the bottom of the board. The amount that the nose and tail of the board are curved up. If a board has 4 cm of rocker, then the tip and tail are 4 cm higher than the middle of the board.
Rectangular wooden box set on rockers, used in mining. The rocking motion caused the mixture of dirt and water to flow through the box, with gold-bearing particles trapped by riffles on the bottom. It was also called a cradle because of its resemblance. Improved upon by the long tom and the sluice box.
The amount of curve of the part of a skate blade that touches the ice; hockey skates, for example, have plenty of rocker, allowing for quick turns and maneuvering, while speed skate blades have almost no rocker, which allows for greater speed on the straight aways, but less agility.
A steel tool with a serrated, curved front edge used in mezzotint to abrade the surface of the plate. Silk Screen A form of stencil printing in which an image is produced by using a squeegee to push ink through a stretched mesh fabric (historically silk). Nonprinted areas of the screen are blocked off using a resist.
The upward curve of the keel line from the center of the kayak toward the ends; rocker is best seen when you look at a kayak from the side. More rocker helps the boat make quick, easy turns in tight coastal areas or rivers, and it helps you stay on course in rough seas because it keeps you on top of waves. In flat or moderate conditions, less rocker helps you paddle efficiently in a straight line.
The curve of the surfboard bottom from nose to tail viewed from the side. Probably the single most important factor in surfboard design, because it controls the general flow of water from its entry (where water first contacts the bottom) to its release (where water leaves the board). The difficulty of handshaping an evenly balanced rocker is legendary among shapers, but has largely been relieved by improved blank technology and the use of computer shaping machines. * see illustration
The amount of curvature in a wakeboard. If a wakeboard has 2 inches of Rocker, then the tip and tail are 2 inches higher than the middle of the board. There are two types of rocker, continuous and three-stage. Continuous rocker is a smooth curve, while a board with three-stages of rocker, with a flat spot in the middle of the board.
In canoe design, the curve of the keel line from bow to stern. A straight keel line has no rocker, tracking well but lacking maneuverability. A heavy rocker is exceptionally maneuverable but will not track well. Moderately rockered canoes are usually straight with a rise toward the ends. Most general recreation canoes have a moderate rocker.
1. A turn on one foot in which the skater changes direction but not edge, producing a trace which is a section of one circle before the turn and a section of another circle of opposite curvature after the turn. The cusp of the turn points inwards from the center of the circle preceding the turn and outwards towards the center of the circle following the turn. 2. Any compulsory figure consisting of three circles in which rocker turns are used to transition from the center circle to the end circles. 3. The curved contour extending from the heel to toe of a skate blade.
A device used for concentrating gold in small-scale placer mining operations work. The rocker is usually hand operated and is used by shoveling gravel into a hopper, bailing water into the honker and rocking the device from side to wash the gravel and concentrate the gold.
the difference between the height of the ski tip and the center of the ski body, and the difference between the height of the ski tail and the center of the ski body when the ski is placed on a flat surface and viewed from the side.
"Rocker" is a song by Australian hard rock band AC/DC. It is the sixth track of their Australian album T.N.T., released in December 1975 (see 1975 in music), and was written by Angus Young, Malcolm Young, and Bon Scott.