Friday, July 18, 2008

Cloud formation:

Thunderstorm clouds are shaped wherever there is enough upward motion, unsteadiness in the vertical, and wetness to produce a deep cloud that reaches up to levels somewhat colder than freezing. These circumstances are most often met in summer. Lightning occurs less commonly in the winter because there is not as much shakiness and moisture in the atmosphere as there is in the summer. These two ingredients work mutually to make convective storms that can produce lightning. Without volatility and moisture, strong thunderstorms are unlikely. Lightning originates around 15,000 to 25,000 feet above sea level when raindrops are carried upward until some of them convert to ice.

Friday, July 4, 2008


An aircraft is a means of transport which is able to fly through the Earth's atmosphere or through any other atmosphere. Many rocket vehicles are not aircraft because they are not supported by the surrounding air. All the individual activity which surrounds aircraft is called aviation.
Manned plane are flown by a pilot. Until the 1960s, unmanned plane were called drones. During the 1960s, the U.S. military brought the term remotely piloted vehicle (RPV) into utilize. In additional the term unmanned aerial vehicle (UAV) has become common