FAA对美国1994～2005年通用航空的发展预测,涡轮固定翼飞机的发展速度将远远高于活塞式飞机。 1993年,全美国固定翼通用飞机中,涡轮飞机有7826架,占5.1％,预计到2005年,将达到11600架,占7.2％。去年,涡轮直升机有3541架,占直升机总数的62％,至2005年,预计达到5800架,占总数的76％。同期活塞螺旋桨直升机的数量将从2211架降至1800架。 The FAA forecasts the development of general aviation in the United States from 1994 to 2005, and the development speed of the turbine fixed-wing aircraft will be much faster than that of the piston aircraft. In 1993, of the total number of US fixed-wing general aircraft, there were 7826 turbo aircraft, accounting for 5.1%. It is estimated that by 2005, it will reach 11,600, accounting for 7.2%. Last year, there were 3,541 turbine helicopters, accounting for 62% of the total number of helicopters. By 2005, it is estimated to reach 5,800, accounting for 76% of the total. In the same period, the number of piston-propeller helicopters will be reduced from 2,211 to 1,800.