temperature and its volume. The high pressure gases are then partially expanded through a turbine which drives the compressor. The residual gas is used to produce a high leaving velocity and with it the thrust to move the craft. Turbojet or turbofan engines perform better at higher speeds.The ramjet engine is an internal-combustion engine. The air compression needed for combustion is obtained from the speed of forward motion alone. As in the turbojet its power output is delivered as the jet thrust of its released gases. The ramjet consumes so much fuel that it is used only in guided-missile applications.Types and UsesCommercialCommercial planes are typically used to carry passengers or mail. A type of commercial plane would be the Boeing 727. MilitaryThere are four types of military planes: combat, cargo, training, and observation planes. Combat planes are either fighters or bombers for land, sea, and carrier operations. A type of military plane would be the B-1B Bomber and the F-4 Phantom.GeneralGeneral planes are usually used for private pleasure, business, agricultural or other special services. The most common use would be agriculture. Agricultural applications include dusting and spraying insecticides or herbicides, fertilizing, and seeding. This research paper brought me to some interesting places and gave me the opportunity to meet people who had a lot to say about airplanes. I got to talk to people who repair airplanes to people who were ex-pilots in the military. I learned a lot about airplanes, but part of really wanting to know about something is having an interest in it from the beginning....
