Re: Ed, that is my experience,with the physics of choo-choo's as well.
Author: Hot Water
Date: 01-23-2018 - 14:43
BOB2 Wrote:
-------------------------------------------------------
> You are trying to create friction to slow down, by
> the process of conversion of the energy from the
> mass and momentum of the moving train into heat
> energy. The momentum energy is being dissipated
> in the heat from the brake shoes interacting with
> the wheels, the more surface area the more heat
> dissipated, the quicker you stop.
>
> Sliding the wheels dramatically reduces the amount
> of the surface area creating friction, and the
> heat that can be dissipated, to just the much
> smaller surface area of the wheel in contact with
> the rail head. It is, thus, much less effective in
> transferring the energy from the mass of the
> moving train into heat energy, and stopping the
> train or cut you are handling. There were times
> when I even used a slight bit of power, along with
> sand, to make sure I didn't slide the wheels, and
> lose much of that greater friction and the heat
> energy being created.
>
> Reversing the engine, if it results in sliding the
> wheels. is not going to stop you faster, in my 18
> years of experience. But, I've had my butt
> tightened, up not a few times, in situations like
> that, where I wish I could have thrown an anchor
> out, though.
>
> You are protected by law from reporting unsafe RR
> conditions. And, while I've seen folks threaten
> over that, I've never seen anyone successfully
> removed from service for that.
>
> As I noted about this thread, we have so little
> real factual information about what really
> happened or why he was really purportedly pulled
> out of service, that all of this is speculation.
> And while it's been a while since I've run, I was
> certainly not impressed by the little bit of the
> story we were told, with the train handling skills
> he is reported to have used in this situation, him
> being RR "family", or not.
Very well detailed explanation, and very accurate. Only one other item to consider; with DC traction units, in many cases the "throwing the reverser into reverse" while under power, many times trips the ground really, and thus NOTHING HAPPENS.
BNSF engr claims wrongly fired in Portland, OR, incident
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SP 0-6-0 |
01-22-2018 - 14:01 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Reader |
01-22-2018 - 14:07 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Pdxrailtransit |
01-22-2018 - 14:51 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Dr Zarkoff |
01-22-2018 - 19:18 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Pdxrailtransit |
01-22-2018 - 20:16 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Dr Zarkoff |
01-23-2018 - 11:23 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Nussel Snouts |
01-22-2018 - 16:17 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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George Andrews |
01-22-2018 - 19:04 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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UP6900 |
01-23-2018 - 02:13 |
Re: Norvells are good people
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John Leslie Micheal Beagle,an |
01-24-2018 - 15:21 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Erik H. |
01-22-2018 - 21:34 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
|
Nudge |
01-23-2018 - 11:21 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Dr Zarkoff |
01-23-2018 - 11:38 |
Re: BNSF engr claims wrongly fired in Portland, and Eric H you know the facts of this case?
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BOB2 |
01-23-2018 - 11:53 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
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Graham Buxton |
01-23-2018 - 11:55 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
|
Ed Workman |
01-23-2018 - 13:39 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
BOB2 |
01-23-2018 - 14:23 |
Re: Ed, that is my experience,with the physics of choo-choo's as well. |
Hot Water |
01-23-2018 - 14:43 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
Dr Zarkoff |
01-23-2018 - 17:11 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
102500 |
01-23-2018 - 20:12 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
Dr Zarkoff |
01-24-2018 - 13:29 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
ex-BN |
01-23-2018 - 17:14 |
Re: Zark we have at least one candidate for recertification.....
|
BOB2 |
01-23-2018 - 17:30 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
Dr Zarkoff |
01-23-2018 - 17:33 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
ex-BN |
01-23-2018 - 18:16 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
BOB2 |
01-23-2018 - 19:06 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
ex-BN |
01-23-2018 - 19:42 |
Re: Really? Sliding the wheels by putting in reverse somehow creates more friction on icy rail?
|
BOB2 |
01-23-2018 - 20:55 |
Re: Really? Sliding the wheels by putting in reverse somehow creates more friction on icy rail?
|
Dr Zarkoff |
01-23-2018 - 22:24 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
Dr Zarkoff |
01-23-2018 - 19:15 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
Chris Walker |
01-23-2018 - 20:12 |
Re: Ed, that is my experience,with the physics of choo-choo's as well.
|
Ed Workman |
01-24-2018 - 08:05 |
Re: Ed, steam choo-choo's could reverse and didn't have air brakes way back then..
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BOB2 |
01-24-2018 - 08:39 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
|
Dr Zarkoff |
01-23-2018 - 17:27 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
|
Nudge |
01-23-2018 - 18:39 |
Re: BNSF engr claims wrongly fired in Portland, OR, incident
|
Dr Zarkoff |
01-23-2018 - 19:18 |
Re: So what is thet claim you're trying to make here Nudge?
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BOB2 |
01-23-2018 - 19:24 |
Re: So what is thet claim you're trying to make here Nudge?
|
Dr Zarkoff |
01-23-2018 - 19:40 |
Re: So what is thet claim you're trying to make here Nudge?
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Nudge |
01-25-2018 - 11:19 |