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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...
37: ...onstruction) and rigid airships that have a rigid frame. The most successful type of rigid airship was...
41: ...lift, the aircraft is kept in the air by wings or rotors (see [[aerodynamics]]). With engine lift, the ai...
45: ...foils produce [[lift (force)|lift]], by profiting from airflow patterns determined by [[Bernoulli's eq...
49: ...l" configuration, the lift surfaces are placed in front of a control surface or [[tailplane]]. The oth... - Helicopter (20080 bytes)
1: ...wing aircraft</b>. The word helicopter is derived from the [[Greek language|Greek]] words ''helix'' (s...
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)
8: ... polyester, which will have longer useful life if frequently flown.
13: ... designed with different shapes, forms and sizes, from historic flat geometric designs, through box ki...
21: Kite festivals are held where kites from around the world are displayed in the sky. The...
23: ...giros. The principle is that in a proper wind the rotors spin and create lift. This type of kite requires...
25: ...d for scientific purposes, for example [[Benjamin Franklin]]'s famous (but very dangerous) electrical ... - Hydrogen (20221 bytes)
108: '''Hydrogen''' ([[Latin]]: ''hydrogenium'', from [[Greek language|Greek]]: ''hydro'': water, ''g...
127: ...onductivity]] of any gas, hydrogen is used as the rotor coolant in [[electrical generator]]s at [[power s...
135: ...torage and transport issues), from [[bio-fuel]]s, from and into [[natural gas]] and [[diesel]] fuel. A...
138: ... ([[French language|French]] for ''water-maker'', from [[Greek language|Greek]] ''hud?, "water" and ''...
144: ... is allowed to only be at very specific distances from the proton. Modeling the hydrogen atom in this ... - Flagellum (8951 bytes)
8: ...ok" which allows the helix to point directly away from the cell. A shaft runs between the hook and the...
10: ...s the membrane, and is turned in the process. The rotor by itself can operate at 6,000 to 17,000 [[rpm]],...
12: ... thought that bacterial flagella may have evolved from such pores.
40: ...cilium]] or undulipodium, is completely different from the prokaryote flagella in structure and in evo... - Centrifuge (2358 bytes)
14: ...wer rate than an ultracentrifuge, and have larger rotors, and be optimized for holding large quantities o...
16: ...]s use a centrifuge to partially remove the water from wet clothes.
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)
9: ... Eventually, the wind energy is converted through friction into diffuse heat all through the earth's s...
11: ...nvection|atmospheric convection]] system reaching from the earth's surface to the [[stratosphere]] whi...
13: ...eflectivity) of land and water, humidity, and the friction of wind over different terrain are some of ...
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... - Steam engine (17867 bytes)
9: ... of a steam engine after observing steam escaping from his [[pressure cooking|pressure cooker]] in abo...
15: ...f the vacuum engines were in the pumping of water from deep mineshafts. The Newcomen engine operated b...
19: ...sed a far greater pressure, but more importantly (from a [[thermodynamics|thermodynamic]] standpoint) ...
26: ... the small [[riverboat]] used in the movie [[The African Queen]]. This type is also used in some boile...
30: ...this kind of boiler has the greatest acceleration from a standing start of any marine powerplant.
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