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No trousers day

Posted: Wed Dec 28, 2022 6:08 pm
by chilpaul

Re: No trousers day

Posted: Wed Dec 28, 2022 9:00 pm
by Coder
*shudder* so glad I don't have to ride any sort of subway, like ever, but especially that day.

Re: No trousers day

Posted: Wed Dec 28, 2022 9:29 pm
by Barleymower
Strictly pants by the look of it.😃

Re: No trousers day

Posted: Thu Dec 29, 2022 2:32 am
by moonshadow
It seems this would be more practical in the summer time.

Re: No trousers day

Posted: Thu Dec 29, 2022 2:54 pm
by rode_kater
moonshadow wrote: ↑Thu Dec 29, 2022 2:32 am It seems this would be more practical in the summer time.
This is the London underground they're talking about. There's 150 years of accumulated heat there. As long as they don't go to any outdoor stations they'll be fine.

Re: No trousers day

Posted: Thu Dec 29, 2022 4:31 pm
by r.m.anderson
rode_kater wrote: ↑Thu Dec 29, 2022 2:54 pm
moonshadow wrote: ↑Thu Dec 29, 2022 2:32 am It seems this would be more practical in the summer time.
This is the London underground they're talking about. There's 150 years of accumulated heat there. As long as they don't go to any outdoor stations they'll be fine.
You mean the London underground has no ventilation !?!
Horrors !
What would Marilyn do not having her dress embellished by the air flow topside ?

Re: No trousers day

Posted: Fri Dec 30, 2022 2:33 pm
by rode_kater
r.m.anderson wrote: ↑Thu Dec 29, 2022 4:31 pm"
You mean the London underground has no ventilation !?!
Now you made me look it up. It's actually quite interesting. From wikipedia:
In the original Tube design, trains passing through close fitting tunnels act as pistons to create air pressure gradients between stations. This pressure difference drives ventilation between platforms and the surface exits through the passenger foot network. This system depends on adequate cross-sectional area of the airspace above the passengers’ heads in the foot tunnels and escalators, where laminar airflow is proportional to the fourth power of the radius, the Hagen–Poiseuille equation. It also depends on an absence of turbulence in the tunnel headspace. In many stations the ventilation system is now ineffective because of alterations that reduce tunnel diameters and increase turbulence. An example is Green Park tube station, where false ceiling panels attached to metal frames have been installed that reduce the above-head airspace diameter by more than half in many parts. This has the effect of reducing laminar airflow by 94%.
So it's one of those "it worked in the original design and after 150 years of changes it now doesn't work any more" things.

Re: No trousers day

Posted: Sat Dec 31, 2022 7:38 pm
by Pdxfashionpioneer
It is amazing how often modern “improvements” destroy ingenious, energy-efficient designs.

As to the day itself; I hope the word of this doesn’t get out or Portland, Oregonians will insist on putting more of our light rail system underground.

Re: No trousers day

Posted: Sun Jan 01, 2023 11:08 am
by STEVIE
r.m.anderson wrote: ↑Thu Dec 29, 2022 4:31 pm What would Marilyn do not having her dress embellished by the air flow topside ?
In London, that would never have occurred in the first place.
The airshafts there appear to have taken the form of chimneys and by the photos some architectural gems too.
Chimney?

Re: No trousers day

Posted: Sun Jan 01, 2023 1:16 pm
by trainspotter48
I understand that another 'trick' for hiding a ventilation shaft is to pass it up through a building. There is a series of TV programmes (presented by Tim Dunn and Siddy Holloway) about the London Underground that have most recently been shown on the 'Yesterday' channel in the UK. If you have an interest in underground railways they can be well worth watching. The first line actually used coke burning steam locomotives!!