ГИГАНТСКИЕ ПОВОРОТНЫЕ КРУГИ ДЛЯ ПАРОВОЗОВ — Как ИХ ВРАЩАЛИ ВРУЧНУЮ?

With the advent of railways in the 19th century, a new engineering challenge arose: how to quickly turn heavy steam locomotives before returning. To this end, gigantic turntables were built at major stations and locomotive depots, some capable of supporting engines weighing over a hundred tons. But how were such structures turned manually, without the use of powerful engines? In this video, we explore the design of 19th-century turntables and discover the engineering principles that allowed one or more workers to turn a multi-ton locomotive. We'll examine the design of the central support, the balancing system, and the load distribution features that ensured rotation required significantly less effort than might initially appear. Special attention will be paid to the operating principle of turntables. The bulk of the locomotive's weight was transmitted through the central axle and a system of support rollers, which significantly reduced friction. With proper balancing, the locomotive's center of gravity was located almost directly above the axis of rotation, so even a very heavy machine could be slowly turned manually using long levers. We'll also discuss the construction of such structures. Turntables were installed in deep brick or stone pits, equipped with high-strength metal trusses, and required extremely precise assembly. Even small deviations could cause the structure to become uneven or hinder its rotation. We'll also examine the largest railway depots in Europe, the Russian Empire, and North America, where such mechanisms were used daily. Many of these turntables continue to operate today, remaining a shining example of the engineering excellence of the Industrial Revolution. How did 19th-century engineers create a mechanism that allowed locomotives weighing tens and even hundreds of tons to be manually turned? What technical solutions made this possible, and why have many of them survived to this day? Subscribe to the "Tartaria and Secrets" channel.