the largest scale model ever?

[Hobbes]

The Royal Navy Submarine Museum in Gosport has a 1:5 (!) scale model of a Vanguard-class SSBN in its collection. This model was built to help validate the sub's design. It was constructed by EDM Ltd. It took over five years to complete and cost in excess of £25m.

Some photos can be found here.

I saw this thing last year, it's awesome. The museum doesn't have enough space to display the entire model, but even then it's huge. Stupidly, I didn't take any photos; these are the only ones I could find on the web.

edit: I see direct links to the photos aren't possible, you'll have to got to the linked page to see them, they start at this photo.