On Tue, 19 Oct 2010 22:04:51 +0100 someone who may be andrew
wrote this:-

The cost tends to be proportional to the mass of the equipment.

No doubt the case if one is only considering one type of equipment.
However, the Archimedean screw I linked to earlier means a whole new
set of considerations. Vastly easier to make than a turbine and with
no need to ensure dimensional accuracy to the same degree, but I
imagine higher civil costs.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000...#pt3-pb3-l1g54