The Horseless Age Volume 35 (Paperback)

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. 1915 Excerpt: ...directions, in which all strains are balanced. In order to illustrate clearly the points In the four different types of wheels mentioned above, the diagrams (Fig. 4) shows the application of the same number of spokes to produce different strength of structure. A represents the original form of lacing as applied to automobiles; B, the cross bracing which followed later; C, the partially braced construction, and D the General Rim Co. lacing, braced correctly. Considering wheels of the four types, each having the same number of spokes, laced as shown in the four different figures, we find the following: All four types will carry the same vertical load. All four types will carry the same driving load. All four types will carry the same braking load. Wheel shown at D is the only one in which the full value of each spoke can be utilized to resist side strain, and in which side strain is balanced. Referring to the physical properties of wire wheels, much has been said concerning the resilience of wire wheels in comparison with wood wheels. A wooden wheel is built entirely in compression, due to the fact that it is assembled as a unit and drawn into shape and held there by the application of a steel band shrunk in position to hold the wheel together. Any load placed on a wooden wheel is carried by the spokes below the centre of the wheel to the hub and in a direct line from the point of contact with the road to the centre of the wheel. A wire wheel is built with the spokes in tension, and the rim in compression, the whole being held together as a unit by the tension of the spokes. Any load carried on a wire wheel is carried by spokes above the centre of the wheel, which adds to the initial tension due to stringing. Consider a wooden wheel.in service, fitted complet...