e are considerably fewer problems with gas turbine engines than its predecessor, the reciprocating engine; however, the environment, as well as time are the greatest hindrance. The average commercial airplane flying today is almost twenty years old, and their engines are now in need of constant upkeep and repair (Schonfeld, 1995, p. 245). This is because, "Aircraft engines must perform in extremely hot and cold environments. A plane taking off from Antarctica, for example, can have its internal engine temperatures go from a bone-chil
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