On 13 Oct 2004, Boltar wrote:

"Andrew" wrote in message ...

This is highly speculative and I'm sure the engineering feats involved
would be considerable, but how about connecting the Northern City /
WAGN line with the Thameslink spur into Moorgate, and restoring the
3rd curve at Farringdon Junction making it a triangular junction
again. Would create

I suspect the gradiants and curves required to join the 2 would be too
severe unless a new line split off from blackfriars since from Barbican
you'd have to drop about 20 metres and do a 90 degree turn

More like a 120 degree turn, i think.

in the space of 1/4 mile.

Think outside the box! Don't do it with a curve to the north, do with with
a curve to the south - a spiral tunnel heading down and round. Not only
does that give you the space to do it, but it spreads the height change
out over a greater distance.

tom

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POTATO POWER IS UNTRACEABLE POWER