Why don't trains just use simple transmission lines?
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 theGET YOUR DAILY NEWS DIRECTLY IN YOUR INBOX
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