rotational drag
121Egg drop competition — An experiment usually performed by college or high school students enrolled in technical courses such as physics and engineering. Competitors typically attempt to create a device that can keep a raw chicken egg intact when dropped from a height.… …
122Retarder (mechanical engineering) — A retarder is a device used to augment or replace some of the functions of primary friction based braking systems of (usually) heavy vehicles.Friction based braking systems are susceptible to fade when used extensively, and this can become… …
123Glossary of cue sports terms — The following is a glossary of traditional English language terms used in the three overarching cue sports disciplines: carom (or carambole) billiards referring to the various carom games played on a billiard table without pockets; pool (pocket… …
124Flyby anomaly — The flyby anomaly is an unexpected energy increase during Earth flybys of satellites. This has been observed as an anomalous shift in the S Band and X Band Doppler and the ranging data which translates to a significant velocity increase of a few… …
125Wide chord — A wide chord fan engine is a term to describe a modern turbofan jet engine having a ducted fan with a specific blade geometry In layman s terms, they would be described as having wider blades than other jet engines.OverviewThe main fan on a jet… …
126Gorlov helical turbine — A.M.Gorlov with his turbine. The Gorlov helical turbine (GHT) is a water turbine evolved from the Darrieus turbine design by altering it to have helical blades/foils. It was patented in a series of patents from September 19, 1995[1] to July 3,… …
127Brabham BT19 — Racing car Car name = Brabham BT19 Category = Formula One/Tasman Series Constructor = Motor Racing Developments Designer = Ron Tauranac Team = Brabham Racing Organisation Drivers = Jack Brabham Chassis = steel spaceframe Front suspension = Double …
128Non-rocket spacelaunch — Non rocket space launch (NRS) is a launch into space where some or all needed speed and altitude is provided by non rocket means, rather than simply using conventional chemical rockets from the ground. A number of alternatives to rockets have… …
