Fifteen-inch gauge railway
Fifteen-inch gauge railways were pioneered by Sir Arthur Percival Heywood who was interested in what he termed a minimum gauge railway for use as estate railways or to be easy to lay on, for instance, a battlefield. In 1874, he described the principle behind it as used for his Duffield Bank Railway, distinguishing it from a "narrow-gauge" railway. Having previously built a small railway of 9 in gauge, he settled on 15 in gauge as the minimum that he felt was practical.
Romney, Hythe and Dymchurch Railway
Ravenglass & Eskdale Railway
One of the Chemin de fer Touristique d'Anse's X131 when passing through the hills
Sir Arthur Percival Heywood, 3rd Baronet is best known today as the innovator of the fifteen inch minimum gauge railway, for estate use.
with his first engine at Duffield Bank Railway in 1875
The second steam engine with radiating axles was the 15 in (381 mm) gauge 0-8-0 steam locomotive Muriel built in 1894