返回Google圖書搜尋

Notes on the Stalling of Vertical Tail Surfaces and on Fin Design

出版	National Advisory Committee for Aeronautics, 1940
URL	http://books.google.com.hk/books?id=-stCAQAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋A discussion is given of the important aspects of the stalling of vertical tail surfaces. The type of instability encountered is described and the possibilities of inadvertent occurrence are noted. The influence of directional stability on the behavior of an airplane when the tail stall takes place is discussed. In this connection, flight tests of a twin-engine airplane in which the vertical fin area is increased are cited. The reasons for inadequate directional stability in certain modern designs are accounted for and the properties and application of dorsal fins are discussed. In addition, the chief factors regulating the requirements for conventional fin area given, in which connection a simplified criterion for directional stability is presented.