Applied aeronautics; the airplane - Beeldbibliotheek

48 APPLIED AERONAUTICSWhen in the air the machine is supported by the wings which are attachedto the fuselage at the center wing- section. The system of supports, trussesand stay wires between the upper and lower wings transfers most of thesupport from the wings to the center panel section of the upper wing. Thisresults in tension in the upper longerons and compression in the lower.The fuselage struts are usually made of spruce, although ash is sometimesused. The struts are joine