Post by Christopher J on Jun 27, 2005 20:15:57 GMT
Hello all,
Is it true that when under heat, the roofs of C Stocks expand?
I was on an H&C in the bay at Barking today in the front (West End) DM of a C stock, I had the entire car to myself and I know for a fact that no body else was on board as I could see right though the entire 6 cars of the Train.
I could hear little 'creeks' and 'cracks' from the above of the Train, all of a sudden there was a massive BANG! from the top of the Train, like something had just fell out of the sky and hit it! (Must admit, it did frighten the absolute living daylights out of me as I was in a little day-dream at the time of it happening... ;D)
Because there was nobody on board, I knew the bang couldn't of been caused by Human activity.
Can anybody tell me if this was the roof expanding or not? And why the roof expands/needs to in hot situations?
Much appreciated,
Christopher.
Is it true that when under heat, the roofs of C Stocks expand?
I was on an H&C in the bay at Barking today in the front (West End) DM of a C stock, I had the entire car to myself and I know for a fact that no body else was on board as I could see right though the entire 6 cars of the Train.
I could hear little 'creeks' and 'cracks' from the above of the Train, all of a sudden there was a massive BANG! from the top of the Train, like something had just fell out of the sky and hit it! (Must admit, it did frighten the absolute living daylights out of me as I was in a little day-dream at the time of it happening... ;D)
Because there was nobody on board, I knew the bang couldn't of been caused by Human activity.
Can anybody tell me if this was the roof expanding or not? And why the roof expands/needs to in hot situations?
Much appreciated,
Christopher.
. It is nothing more or less than the facts of physics that metal, when heated, expands. Thus, when the train has been stationary for a short while, with the sun beating down on the roof, it will expand. Once the train moves, the air movement will cool it down, and it will contract again - until the next time it sits in the blazing sun ;D ;D
