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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...
45: ...oulli's equation]] and, to some extent, the [[Coanda effect]].
51: ...plane]]s (three wings) were numerous in the early days of aviation. Subsequently, most planes are [[mo...
59: ...s jets at the tips but most have one or more lift rotors powered from engine-driven shafts. - 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.
9: ...s (some helicopters can carry slung loads, accommodating awkwardly shaped items), or as a mount for st...
15: ...ying helicopter was first conceived by [[Leonardo da Vinci]] in the [[15th century]], but it was not u...
19: ... the wings themselves are moved. The helicopter's rotor can simply be regarded as rotating wings. - Kite flying (5612 bytes)
1: ...okaichi Giant Kite Festival held on the fourth Sunday every May in [[Higashiomi, Shiga]], Japan.]]
6: ...to sever the competitor's kites. Such practice is dangerous since the abrasive strings can catch on pe...
23: ...giros. The principle is that in a proper wind the rotors spin and create lift. This type of kite requires...
25: ... example [[Benjamin Franklin]]'s famous (but very dangerous) electrical experiment. Kites are the prec...
27: ... all over [[India]]. The festival is a public holiday in the state of [[Gujarat]]. - Hydrogen (20221 bytes)
1: <!-- Here is a table of data; skip past it to edit the text. -->
6: ...r><td colspan="2" align="center">'''hydrogen''' – [[helium]]</td>
10: ...="text-align: right"><small>[[Periodic table (standard)|Full table]]</small></div></td></tr>
40: <td>[[Oxidation state]]s ([[Oxide]]) </td><td...
82: ! [[natural abundance|NA]] - Flagellum (8951 bytes)
10: ...s the membrane, and is turned in the process. The rotor by itself can operate at 6,000 to 17,000 [[rpm]],...
24: ... or a just a highly-derived bacterium with heavy adaptation to [[extremophile|extremophily]], particul... - 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)
13: The change of seasons, change of day and night, the [[Coriolis effect]], the irregula...
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.
24: ...for three-dimensional vertical-axis turbines like Darrieus or Gorlov turbines (see below). - Steam engine (17867 bytes)
19: ...ferential. But with this added pressure came much danger and many disasters due to exploding boilers a...
58: ...t proved unpopular due to its simple appearance — modelers preferred the complexity and exciting...
70: On [[February 21]], [[1804]] at the [[Pen-y-Darren ironworks]] in [[Wales]], the first self-prop...
79: ...omotive and Machine Works (SLM) but with all of today's possible improvements like roller bearings, he...
88: ...operation of the engine portion alone is not dependant upon steam; any pressurized gas may be used. Co...
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