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Pictured at the Transportation Museum in St louis
This is what happens when you pump out a tank car but forget to open a relief vent to prevent vacuum buildup.
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Are those videos in real time? They weren't on train tracks when imploded, correct?This is what happens when you pump out a tank car but forget to open a relief vent to prevent vacuum buildup.
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Yes, real time. The internal pressure drops until it reaches the tipping point and rapidly collapses. Sometimes the whole car jumps up, including the wheels. I would imagine that a submarine that exceeded it's pressure depth could implode with the same rapidity.Are those videos in real time?
It is interesting I believe how apparent it is how much stronger/thicker the tank car end caps are proven to be in these videos, being they are designed to resist puncture damage in train mishaps.
Thank you.Yes, real time. The internal pressure drops until it reaches the tipping point and rapidly collapses. Sometimes the whole car jumps up, including the wheels. I would imagine that a submarine that exceeded it's pressure depth could implode with the same rapidity.
The end caps aren't thicker than the walls of the tank, the outward convex shape adds some strength. By regulation, these tank cars have a minimum wall thickness of 7/16 inch, or 11.1 millimeters to comply with DOT-111 tank car rules.
That's an interesting wooden tank car. These days vinegar is transported in standard tanks lined with plastic, or stainless tanks.Thank you.
At my recent visit to the extensive train exhibit in St Louis, the posted signage on tanker cars mentioned over the years they had upgraded the end cap requirements on tankers for reasons I mentioned, I don't recall if that also included the entire tank. This wood steel strapped tanker also caught my eye.
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Even then, engineers understood basic ventilation requirements. For instance, B&O's (now CSX) 4,475 foot long Sand Patch tunnels were built in the middle 1800s, but still had vertical ventilation shafts bored into the tunnel.So, I am curious, back in the day with steam locomotive passenger trains and non-air-conditioned passenger cars, what was the passengers experience when traveling thru a long tunnel, air quality wise?