Half a croissant, on a plate, with a sign in front of it saying '50c'
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0.5 and holding.

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Central London satellite launcher

Hungerford Bridge rail gun satellite launcher -
  [vote for,

or Charing Cross, we have a problem..

Damn great steel object doing nothing most of the night, with loads of spare rail on the deck last time I looked.

It also has a power supply sufficient to shift a train. Use that to send a lower mass object.

And the scientists could go hang out in Leicester Square after each successful launch.

Shock tube http://en.wikipedia.org/wiki/Shock_tube
Oh YES ! [8th of 7, Nov 17 2009]

Sock Tube http://www.socktubepresents.com/
...oh, I thought you said... [Frankx, Dec 04 2009]

Greenwich Foot Tunnel http://www.greenwic...nwichFootTunnel.htm
Remarkably unexciting. [8th of 7, Dec 04 2009]

Woolwich Foot Tunnel http://www.yellins....ichferry/tunnel.htm
Seen one, seen 'em all ... [8th of 7, Dec 04 2009]

Brunel's Thames tunnel http://www.sciencea....asp?image=10322655
Quite an achievement. [8th of 7, Dec 04 2009]


       We have always considered that the Circle Line would make an awesome shock tube. <link>   

       (Or indeed the Woolwich Foot Tunnel. As a working demo, how about the South Kensington underpass ? Conveniently adjacent to the Science Museum )
8th of 7, Nov 17 2009

       "South Kensington underpass"..there is one? Not my usual patch (too poor(me, not them)). I'll vote for that and a shock tube, yep I'm frequently shocked usually by the ticket price :)   

       It would be kind of fun to do an organic tube, built out of GM'd intestines, and it could just swallow you up and could then say with perfect honesty "I had a crap journey on the Tube". Tried writing it in part of a short-story, it was the only good bit though :(   

       //"South Kensington underpass"..there is one? //
Yes, it runs from the Tube station, then under Exhibition Road, past the Natural History Museum, the V&A and up to the Science Museum.
Someone once told me it used to have its own small electric railway, but I've never seen it confirmed.
coprocephalous, Nov 20 2009

       It still does. But it is very, very small.
MaxwellBuchanan, Dec 04 2009

       Is it the railway that's small, or the electricity ?
8th of 7, Dec 04 2009


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