Learning to Fly in the U S Army a Manual of Aviation Practice
The book Learning to Fly in the U S Army a Manual of Aviation Practice was written by author Elisha Noel Fales Here you can read free online of Learning to Fly in the U S Army a Manual of Aviation Practice book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Learning to Fly in the U S Army a Manual of Aviation Practice a good or bad book?
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It should be borne in mind that any piece or kind of wood will not answer for framing, and more espe- cially for repair parts. There is a tremendous dif- ference in the strength and suitability among dif- ferent woods for the work. For instance, a piece of wood of cross or irregular grain, one with knots, or even one which has been bored or cut or bruised on the outside, may have only half or less the strength of the original piece. Air drying doubles the strength of green wood, proper oven dry...ing is better yet. Notice how the ends of each piece are ferruled, usually with copper or tin. This is to prevent the bolt pulling out with the grain of the wood, and also prevents splitting and end checking and gives a uniform base on which the pressure comes. It is generally advised not to paint wood as it tends to conceal defects from inspection. So varnish only. Wrapping wooden members with linen or cord tightly and doping this, both to make waterproof and to still further tighten, increases the resistance MATERIALS OF CONSTRUCTION 125 to splitting.
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