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Pelikan tail
The Pelikan tail is an experimental tail design for fighter jets. Originally conceived by Ralph Pelikan, who was hired by McDonnell Aircraft, later worked for McDonnell Douglas and after another merger, retired from Boeing. His design has not to date been incorporated into any publicly available jets. However, it has been considered or included in design specifications in the original Boeing X-32 fighter design.〔
==Advantages and disadvantages==
The Pelikan design differs from the traditional elevator-and-rudder design in that it uses only two control surfaces in order to achieve control of pitch, yaw, and roll. When evaluated by Boeing engineers in October 1998, they found advantages of greater pitch control at high angles of attack and that two tails would have a lower radar signature than four.〔 However, they also found that using two larger control surfaces instead of four, might actually make the aircraft heavier. The bigger hydraulic pumps and cylinders needed to operate the larger surfaces would add of weight to the design.〔 This, and other factors made them use a four-post tail instead.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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