Chatley, Herbert, 1885- · New York, D. Van Nostrand company · leaf 69
and the proportions adopted.Many successful machines have beenarranged with two pairs of transverseplanes (with or without cell partitions,as in the Hargrave box-kite). Each pairis framed with rectangular panels, thetwo pairs being connected with a longi-tudinal frame or girder. This type seems to… … 61 The frames are at present generallyconstructed of timber or stout bamboo,but steel tube is used in some cases. In considering the strength of theframe we have three main parts: (1) Longitudinal girder, sometimestriangular and sometimes rectangular. (2) The fore girder, rectangular insection. (3)…
Airplanes
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