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.
Scrub planes. Scrub planes are used for the fast removal of stock (reducing the size of boards, or pieces of wood). They are relatively short and narrow and usually have thick blades to avoid flexing under pressure. Some woodworkers consider the scrub plane to be a kind of bench plane (see below). However, its design differs from bench planes in several ways and the deep, gouging cuts that it makes give it a reputation as an 'aggressive' tool, as opposed to the more graceful, rhythmic approach associated with bench planes.