bellinghman: (Default)
[personal profile] bellinghman
Well, if it's the train, it appears to be

19 cars, at 50 tonnes per car (I assume the 'customary' weight.)
2 engines, at 118 tonnes per engine (EMD F40PH)

Total 1186 tonnes

OK, that's one heavy train.

Date: 2009-08-21 11:47 am (UTC)
From: [identity profile] bellinghman.livejournal.com
should come with a mach number attached!

Do mach numbers apply in vacuo?

And much less rolling resistance

That's a very good point: deformation of all that tyre rubber isn't something I considered.

I found it interesting that the Montréal Métro uses rubber wheels, as per Paris, while the Vancouver SkyTrain uses steel wheels. For something passing over people's heads, the SkyTrain is remarkably quiet, lacking the screeching I'm so used to with the London Underground.

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