non-fictionDescription of application of fundamental principles of structural theory to aircraft design, circa 1929design procedures, critical loading conditions, reactions, beams, torsion, truss analysis, graphical methods, ties & columns, connections, bending & compression

An Australian wooden dray is a type of heavy-duty, flat-bed cart or wagon historically used for transporting goods, often pulled by horses or bullocks. Drays were essential vehicles in rural and agricultural Australia from the 19th century into the early 20th century, especially before the widespread use of motorized transport. Construction: Drays were built from hardwoods like red gum or jarrah, known for their strength and durability. They had thick wooden axles, large, spoked wheels (often iron-rimmed), and a flat or slightly concave bed to hold loads like wool bales, timber, grain, or fencing materials. Most drays were open or had very low sides, allowing easy loading and unloading of heavy or bulky items. Two-Wheeled Design: Traditional drays usually had two large wheels, though four-wheeled wagons also existed. The two-wheeled version was more common for heavy loads in rough country. Bullock-Drawn or Horse-Drawn: In frontier and agricultural areas, drays were often pulled by teams of bullocks, especially for long hauls. Horses were used where terrain or speed demanded it. Drays were a backbone of colonial transport in Australia, especially before the railway networks expanded. They were critical during the gold rush era, the wool boom, and for pioneering settlements, where they moved supplies over long distances in often harsh conditions. Used by settlers, farmers, timber cutters, and teamsters (drivers of animal-drawn vehicles). farm equipment, transport, horse