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Re: Union Pacific training video -- Bottling the Air is not "leaking off"...FYI
Author: BOB2
Date: 11-13-2018 - 09:28
WAF, I suggest you maybe might want to actually watch the video.
Because with the air "bottled", you have left the brake line "charged" and the brakes "released", and nothing needs to "leak" to make it roll away on a grade. In this case, a leaky train line would be a good thing, as it would leak down and setup the brakes.
I worked a job that used to switch Glendale and Burbank, we were on a grade, and used air on that switcher job. When we got back to the to end of Taylor A yard, we would "bottle the air" and "drop" the cut into the top end, when it got down to the flats, the field man would open the angel cock, and "big hole" the train to stop the cut, and set the "heel" (hand brakes" on the bottom end of the cut.
As the video said, "to understand the danger of bottling the air, you need to understand how air brakes work....."
Because with the air "bottled", you have left the brake line "charged" and the brakes "released", and nothing needs to "leak" to make it roll away on a grade. In this case, a leaky train line would be a good thing, as it would leak down and setup the brakes.
I worked a job that used to switch Glendale and Burbank, we were on a grade, and used air on that switcher job. When we got back to the to end of Taylor A yard, we would "bottle the air" and "drop" the cut into the top end, when it got down to the flats, the field man would open the angel cock, and "big hole" the train to stop the cut, and set the "heel" (hand brakes" on the bottom end of the cut.
As the video said, "to understand the danger of bottling the air, you need to understand how air brakes work....."
