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Graeme Wall

On 20/12/2011 13:49, d wrote:
On Tue, 20 Dec 2011 13:04:23 +0000
Graeme wrote:
On 20/12/2011 13:02, Graham Harrison wrote:

"Basil wrote in message
...
On 2011\12\20 08:57, Graham Harrison wrote:
I can't find a tram related newsgroup.

I've sometimes wondered why modern tramcar makers don't make double
deckers. Yes, modern artics swallow lots of people quickly but they also
take up a lot of space. A double deck artic (with connections at both
levels)

How would the upper floor connection cope with vertical curves?

That's an engineering detail (he said having no idea what the answer is!).

Not insoluble but possibly expensive.

Have the universal joint at floor level with the upper deck instead of at
floor level with the lower deck. Fairly simple.

For a given value of simple. Means the buffing loads will be rather
higher than is usual for rail vehicles which will have major
implications for the design of the trams.

--
Graeme Wall
This account not read, substitute trains for rail.
Railway Miscellany at http://www.greywall.demon.co.uk/rail