|
|
| Re: How Railroad Could Have Avoided / Ameliorated Fiery Crash (1338906) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: How Railroad Could Have Avoided / Ameliorated Fiery Crash |
|
|
Posted by j trainloco on Sun Feb 8 19:57:02 2015, in response to Re: How Railroad Could Have Avoided / Ameliorated Fiery Crash, posted by Joe V on Sun Feb 8 18:48:56 2015. You're fundamentally misunderstanding the "two impacts", and the force that acts on your body during braking.In an accident, the first impact causes the rapid deceleration of the vehicle. Anything not secured (I.e. - your head) continues forward and impacts a surface (this is the second impact). However, both impacts are introduced on the occupant due to the original jerk. Whether you are traveling 80, or 30, when the train undergoes braking force, it acts on your body at the same force. Let's say that the braking rate is -6 mphps. As soon as that negative acceleration is introduced to your body, you begin experiencing jerk. If that jerk rate is too high, it will cause whiplash. However, maximum deceleration is reached and then jerk rate resets to zero, and there is an extended period of constant force felt from the deceleration. If you withstood the initial jerk, then this time period will not really impact you, and if you smashed your face, then you're going to stay pressed against the seatback in front of you. The only impact that speed has on this time period is how long it lasts. Finally, at 0, the jerk rate increases again as the train stops. If the deceleration doesn't tail off, then you'll feel a high jerk rate that will push you back into your seat, but that jerk will be the same, regardless of whether you started at 80, or at 30. |
|
|
|