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- Tropical cyclone (34538 bytes)
6: ...rom the equatorial region toward the higher latitudes.
9: ...ation]] from water vapor condensing at high altitudes. Because of this, a tropical cyclone can be thou...
11: The ingredients for a tropical cyclone include a pre-existing weather disturbance, warm tropical...
13: ...water, which provides the atmospheric moisture needed. The evaporation of this moisture is driven by t...
16: ...ons, tropical storms and a third group whose name depends on the region. - Airline (29546 bytes)
1: ...tography of Air Kenya, Kenya Africa. Picture provided by [http://classroomclipart.com Classroom Clip A...
11: ...it greater freedom, in steps that are usually decades apart. This pattern has not been completed for a...
13: ...uenced by macroeconomic activity in the markets under study. These patterns are highly seasonal, and o...
15: ...ions, but certainly areas where deregulation provided more competition and greater pricing freedom res...
17: ...upgrades they ordered to respond to the increased demand. Since 1980, the industry as a whole has not ... - Aircraft (13315 bytes)
15: ... use a spinning rotor (a ''rotary wing'') to provide both lift and thrust. The abbreviation [[VTOL]] i...
18: ...n particular, these aircraft use a relatively low density gas such as [[helium]], [[hydrogen]] or heat...
24: Below, we describe classifications by design, propulsion and usage.
29: ====By design====
33: A first division by design among aircraft is between lighter-than-air, '... - Propeller (12179 bytes)
1: ...sure from the forward and rear surfaces of the blades.
6: ... an inefficient angle, the inboard ends of the blade are subsumed into a streamlined spinner to reduce...
11: ...de the constant speed mechanism to reverse the blade pitch angle, and thus the thrust of the engine. ...
13: ...al to run an engine at an optimum constant independent of flight speed, setting separate requirements ...
15: ... blades also decreases the amount of work each blade is required to perform, limiting the local [[Mach... - Jet engine (22370 bytes)
1: ... the front of the engine (left of photo) prevents debris - or people - from being pulled into the engi...
4: ...ally ignited by flame in the eddy of a [[flame holder]], and burned as an atomized mixture. The [[comb...
6: ...[[piston engine]]s to drive a propeller but small turboprops are getting smaller as engineering technology im...
10: ...of peripheral fitted is dependent on the aircraft design application.
15: ...''', or simply '''jet''') engine, as subsequently developed, would become almost as revolutionary to a...
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