On 9/22/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> For every inch of water pumped out, the boat will drop one inch lower 
> relative to the caisson. But for every inch of water pumped out, the caisson 
> will also rise one inch higher in the canal. So the level of the top of the 
> boat relative to the tunnel stays constant.
<snip>
> A neat solution, but I'm not sure it's the right one for Froghall.
> Martin L

Of course, its much easier just to fill the water tank before the journey! :-)

Mike

-- 
Michael Askin
http://shoestring.zapto.org/


 
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