It's all in the gauge

Just to start: the word "gauge" is one of my spelling blind spots. For some reason, my brain keeps trying to spell it guage. I have no idea why. Maybe this post might cure that!

Jayne raised the question in a comment to my earllier Glenbrook posts as to whether Glenbrook Vintage Railway's gauge was 3' 6" or narrow gauge. Indeed it is, according to sources online. 3' 6" is the standard gauge for NZ rail, and has been ever since Julius Vogel and his 19th century Think Big policies. Why? According to this article from New Zealand Railway Magazine, it's all about cost, and making those pounds stirling he'd borrowed from London spin out just that wee bit more.

"Sir Julius Vogel, who was the father of our new railway policy, urged that we must have long lines of railway and at a relatively small expenditure of money. His policy was that we must have cheap railways, and, as population increased and money became more plentiful, we could increase the equipment of our lines. He Has often been blamed for his extravagance, but so far as his railway policy was concerned, he was careful and economical. As one who was not of his political party—Mr. Gisborne—said of him: “The grasp of his mind was comprehensive, and his foresight was great; and, wild as some of his conceptions seemed to many at first, not a few have proved themselves to contain much that is useful and statesman like.” Sir Julius Vogel did not think it necessary to follow the example of England, or of Australia, so far as railway gauges were concerned. (Even in England since 1870, some railway lines have had their gauges lessened, and in Queensland the 3ft. 6in. gauge has been adopted.)

Viewing what has happened during the past 58 years it will be granted that New Zealand was wise in adopting the moderate gauge it chose. We have improved, as our revenue has increased, the equipment of our railways, in carriages, engines, station buildings, workshops, and so forth. It is true that our recent line have been more elaborately and consequently, more expensively constructed. Had, however, the policy of 1870 not been followed, we would not to-day possess the mileage of lines we have."

The image above, from the NZETC link, is Sir Julius Vogel, K.C.M.G.

The gauge, plus our country's terrain, led to the development of the "Pacific class" of locomotive, as described here.

"The often steep grades and tight curves imposed by the formidable terrain required more power at all operating speeds than was usual. This led to the early development of the oversize firebox, wider than the 3'6" gauge, supported by a 2-wheel trailing truck thus creating the classic "Pacific" locomotive with a 4-6-2 wheel arrangement compared to the 4-6-0 "Ten-Wheeler". In turn, the available power led to a then-astonishing turn of sustained speed that prompted the adoption of the type all over the world."

Image from here.