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- Aircraft (13315 bytes)
15: ...ground). Helicopters and autogyros use a spinning rotor (a ''rotary wing'') to provide both lift and thru...
41: ...lift, the aircraft is kept in the air by wings or rotors (see [[aerodynamics]]). With engine lift, the ai...
57: ... where the body itself produces lift. So far the only significant practical application of the lifting...
59: ...s jets at the tips but most have one or more lift rotors powered from engine-driven shafts.
73: ...nal combustion piston engine]] was virtually the only type of propulsion used for powered aircraft. (S... - Helicopter (20080 bytes)
1: ...] and propelled by one or more large horizontal [[rotor]]s ([[propeller]]s). Helicopters are classified ...
5: ...any location, and land anywhere with a clearing a rotor disk and a half in diameter.
19: ... the wings themselves are moved. The helicopter's rotor can simply be regarded as rotating wings.
23: ...r, the helicopter will not rotate around the main rotor shaft.
25: ...efficient, but less noisy than a traditional tail rotor. Other helicopters use a "Notar" design: they blo... - Kite flying (5612 bytes)
23: ...giros. The principle is that in a proper wind the rotors spin and create lift. This type of kite requires...
45: *[[rotorkite]]
50: *[http://www.haryana-online.com/kite_flying.htm Fighter kites of India] - Hydrogen (20221 bytes)
113: ...omic gas, H<sub>2</sub>, with a boiling point of only 20.27 [[Kelvin|K]] and a melting point of 1...
127: ...onductivity]] of any gas, hydrogen is used as the rotor coolant in [[electrical generator]]s at [[power s...
144: ...[[quantum mechanics]] the electron is allowed to only be at very specific distances from the proton. M...
162: ... air. Deuterium oxide, or D<sub>2</sub>O, is commonly referred to as [[heavy water]]. Hydrogen also fo...
184: Hydrogen is the only element that has different names for its isotope... - Flagellum (8951 bytes)
10: ...00 [[rpm]], but with a filament attached usually only reaches 200 to 1000 rpm.
14: ...ve a single flagellum each on two opposite ends (only one end's flagellum operates at a time, allowing...
30: ...+</sup> ions); archaeal flagella are almost certainly powered by [[Adenosine triphosphate|ATP]]. The t...
36: ... Therefore many assume erroneously that there is only one basic kind of prokaryotic flagellum, and tha...
40: ...lla in structure and in evolutionary origin. The only thing that the bacterial, archaeal, and eukaryot... - Centrifuge (2358 bytes)
14: ...wer rate than an ultracentrifuge, and have larger rotors, and be optimized for holding large quantities o...
26: ... who have experienced an ultracentrifuge losing a rotor compare the experience to having a [[bomb]] explo...
28: ... centrifuge and create an unpleasant sound as the rotor and shaft scrape the casing. - Wind power (27669 bytes)
1: ...nergy by [[wind turbine]]s. This article deals mainly with the intricacies of large-scale deployment o...
11: .... The earth is not heated evenly by the sun. Not only do the poles receive less energy from the sun th...
17: ...ch converts some of that power into torque on the rotor. The amount of power transferred depends on the ...
19: ...8 m/s breeze blowing through a 100 meter diameter rotor would move about 76,000 kilograms of air per seco...
22: rotor would be about 2.5 megawatts. - Steam engine (17867 bytes)
7: ...ism|Greek]], in the [[1st century]] AD, but used only as a toy.
19: ...xcess pressure. Reliable and safe operation came only with a great deal of experience and codification...
40: Some ferryboats have used only a single double-acting piston, driving paddlewhe...
55: ...f this type always have multiple cylinders in an inline arrangement and may be single or double acting...
58: ...-like blades at their outer edge. These moving ''"rotor"'' disks alternate with stationary ''"stator"'' b...
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