This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...diameter, and the width of the blade equal to a one-fifteenth diameter. The angles, etj, a2, a3, being known, as well as the distances of the corresponding points from the centre, it is easy to construct templates to the required shape. The Tatin process--M. Tatin's process has no special peculiarity. It consists ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...diameter, and the width of the blade equal to a one-fifteenth diameter. The angles, etj, a2, a3, being known, as well as the distances of the corresponding points from the centre, it is easy to construct templates to the required shape. The Tatin process--M. Tatin's process has no special peculiarity. It consists principally in choosing a certain diameter, and deducing from it the values of width and pitch. The Chauviere method and that of Pischoff and Koechlin might be mentioned, but they are only interesting from a constructional point of view, as we shall see. IV.--The manufacture of propellers It has been seen that every one of these methods of calculating the design of a propeller leads to the construction of a sort of " table" formed by the edges of the templates on which the blades are shaped. What the surface of the blade will be like can thus be seen at a glance, but there are many more points, chiefly of a constructional nature, to be considered before it is actually made. For example, it has been found advisable to cut off the rear edge from the tip of the blade, and this should be done whenever it is possible. The efficiency of a surface meeting the air reaches its maximum at an angle of incidence of 45; and it was this fact, no doubt, which influenced Bleriot in giving his flexible propeller-blades a width gradually increasing towards the boss. However, he has now definitely abandoned this type. The extreme ends of a propeller in motion move at a very high speed and at a very slight angle of incidence, but those parts nearer the boss move at a decreasing rate, and in order that they may give an equal thrust the angle of incidence must be increased. But the speed increases so much faster than the angle of incidence that they cannot alw...
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Add this copy of How to Build an Aeroplane to cart. $57.17, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Nabu Press.
