1 1930 â 1939 World History - 1930 â 1939 World History Amelia Earhart (1897â1937) The Library of Congress Picture 2  ... RFC: meaning and definitions-RFC: Definition and Pronunciation. 3  Agencies of the United Nations-Agencies of the United Nations Linked to the United Nations through special agreements, the ...
1 Wood was used on most early airplanes and is now mainly used on homebuilt airplanes. 2  Wood is lightweight and strong, but it also splinters and requires a lot of maintenance. 3  Aluminum (blended with small quantities of other metals) is used on most types of aircraft because it is lightweight and strong.
Anyone who has ever seen airframe construction, particularly jet aircraft, understands why aircraft can be built with skins that are extremely thin. And while an aircraft isn't subjected to the same type of forces as a boat hull, the fuselage is the hull and must be strong in different ways.