Now hang on
50 kilometers of 1 mm thick tubing?
If I have my maths right (unlikely, but still) the cooling system alone would be some 40 cubic meters in size. That can't be right.
( Tusk knows where you live, Thu 29 Nov 2012, 19:14, Reply)

50 000 x 0.001^2 x 3.14 / 4
...is not 40 cubic metres. More like 40 litres.
(Avarus, Thu 29 Nov 2012, 23:45, Reply)