This is how railway power lines work despite thermal expansion and contraction
/avatars/BUoTZ6lM79yi.jpg)
/2022/10/02/image/jpeg/m2bqi3gArMhsgvLzHkb6A8SZX50dZdpDWg1TkFl9.jpg "This video explores the best way to reduce emissions from air travel")
/2022/09/24/image/png/iKMAsz0PLydTcVhQQ5Lbz92rKuF1dggiWgMgFysi.png "This is how the world's longest immersed tunnel is being built")
/2023/03/30/image/png/t1eFljMPiX3YvgL96mH4IJnnov7g2U4GjVdo4rTQ.png "Introducing the Liebherr LB 44: The ultimate drilling machine for heavy-duty projects")
/2023/03/29/image/jpeg/8IgnuE9Z0cyiNJ2oOL08NEsMVYG7TQQWmEiFcvMh.jpg "Keeping Ukraine’s sky safe from Russia: The U.S. made AN/TWQ-1 avenger missile system")
/2023/03/28/image/jpeg/tsbpl4HhO264YzHWKZoWNrYIdcJC4ppHd6YCJuB8.jpg "Game of drones: Bayraktar TB-2, MQ-9A Reaper and RQ-4 Global Hawk")
/2023/03/28/image/jpeg/fNsBx9xgKy1SEASXKU18B2KZTRcBgzzJG9Kdd4yp.jpg "Hydraulic press crushes everything in its path")
/2023/03/26/image/jpeg/e2ZbHmmpV0iEwRxiiQ6LuRNajslaLxRDnpFy7lJx.jpg "Drug cartel's submarine fleet: How do drug cartels smuggle cocaine across the sea?")
/2023/03/24/image/jpeg/1Kp0qCH9AWc4FL9BE8O6xzuDdohaN8L5e05pNhlc.jpg "This is why the ChatGPT founder is investing $180M in life extension")
/2023/03/24/image/jpeg/HfK3sTbJx1RArDpqjI7f4sA91pjiBOIdyNhzQobx.jpg "The incredible story of Cologne Cathedral's 600-year construction")
/2023/03/23/image/jpeg/CEDLLTikSjYwRZaxH7x1ojTIcKQ7MQgxCeTuazr2.jpg "5 Extremely powerful machines that take it to another level")
When traveling using trains, it is common to notice hanging weights near the poles. This is perplexing as power can travel through a simple transmission line, one that you would assume railway engineers would develop.
In this video, YouTuber Lesics uses his usual style of imaginatively illustrating science and engineering principles to tackle this question: why are railway power lines so complex?
The answer is a surprisingly simple one, and it has to do with thermal expansion and contraction. The first is a process that happens to railway wires over the summer.
They expand, causing the wires to hang down. This is very dangerous as they can go low enough to actually hit the traveling train. In the winter, thermal contraction causes the wires to shorten and possibly break.
To protect against both these incidents occurring, engineers have come up with an innovative solution that includes the weights placed near the railway poles.
How does this solution work? What is the science and engineering behind train travel? Is this really the safest alternative? Don't railway lines experience thermal expansion and contraction regardless? What is the future of train travel? This video answers all these questions and more.
SHOW COMMENT (1)
/2023/03/27/image/jpeg/aQKeP0cbCAxGEllJojcHsEh1iwNTkXAIyIALFkUA.jpg "Ukraine is using cardboard drones to do battle with Russia now")
/2022/08/14/image/jpeg/pO1Zjpk2BUncI8XgEXKaoSMBWa7Vh8OUaQDLiONA.jpg "The mineral that could remove 1 billion tonnes of CO2 from the atmosphere")
/2023/03/26/image/jpeg/etgoMw8RkaPbjGe18HkP30Fg1rXYWknwojjAlGvS.jpg "New drug could help 500,000 gastrointestinal patients in the US")
/2022/09/23/image/png/J1j5DhjiFAHjb2Wcf1FzGykxeuoseD5Dn4au012r.png "How you could develop US military tech — The Blueprint")
/2023/03/29/image/jpeg/2PrpqrPih0PeZBOXQ3SwNKgK67zGMWZix0Mp72zW.jpg "Fake image alert: AI used to create images of events that never happened")
/2023/03/26/image/png/VA2tQW7dkEYHvJDSCgAXmwfkPyE0hNxXvQrTEArg.png "Google Bard AI: A Comprehensive Guide on Google's New Chatbot")
/2022/10/02/image/jpeg/cU5XErUWnnXO47GlLWaKeXBE3A7cTpf55RVyHT0E.jpg "The Cairo Sketches: Too good to be true wonders of AI")
/2022/11/10/image/jpeg/ohtWN2PpNpbENd5BWMYmoe3JdnPYsV4Tg9YuFUTQ.jpg "The collab’ you didn’t see coming: science and the Bible: The Blueprint")
/2022/12/02/image/jpeg/MNzqrE9kjepAqRqxbux9b2AlmLHT6N9KIBEMBPPp.jpg "How did we get to the Moon? Propulsion technology and the space shuttles")
/2023/03/27/image/jpeg/mKdZyrq0ayaSK81Ljt8Ph7mg8eKgfyq1C9ouk0S8.jpg "Kawasaki presents new high-energy laser system for anti-drone defense")