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Eastern Railroad Discussion > Sand Patch Tunnel's ventilation shafts


Date: 04/20/17 19:40
Sand Patch Tunnel's ventilation shafts
Author: Cumberland

Were either/both of Sand Patch Tunnel's two ventilation shafts ever sealed, after dieselization came along?

Matthew



Date: 04/20/17 20:01
Re: Sand Patch Tunnel's ventilation shafts
Author: M640

No, the biggest one can be seen very easily from RT 160 in the fall, and when the angle of the sun is right daylight shines through, smoke can still be quite bad if you have a cluster of trains close together.



Date: 04/20/17 22:12
Re: Sand Patch Tunnel's ventilation shafts
Author: Cumberland

Smoke? What exactly causes it? I would think that the big issue would be diesel fuel fumes being emitted from the shaft. In any case, it sounds like the shaft is still serving its purpose.

I have seen the shaft, in parson, and also wondered how deep you have to go from the top of the stack to reach the top liner of the tunnel portal itself.

Matthew

M640 Wrote:
-------------------------------------------------------
>.... smoke can still
> be quite bad if you have a cluster of trains close
> together.



Date: 04/21/17 02:06
Re: Sand Patch Tunnel's ventilation shafts
Author: CNJ1524

Cumberland Wrote:
-------------------------------------------------------
> Smoke? What exactly causes it?

Smoke is caused by incomplete combustion, when one of the three sides of the fire triangle are diminished, in this case air



Date: 04/21/17 13:54
Re: Sand Patch Tunnel's ventilation shafts
Author: cinder

Aerial views






Date: 04/21/17 22:33
Re: Sand Patch Tunnel's ventilation shafts
Author: Cumberland

Thanks for sharing your fantastic photography, Ciner!!!

Matthew



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