21. In 1892 a traction engine was purchased to help transport stone to the railway. 22. Small numbers of portables continued to be built even after traction engine production ceased. 23. The Avery company made many traction engines , such as the 1907 steam tractor model. 24. In 1956, Rangiora hosted New Zealand's first traction engine rally at the Rangiora Showgrounds. 25. By distributing the traction engine , the train isn't limited by a central traction system. 26. Sulzer Brothers later discontinued their rail traction engine business. 27. In 1890, Holt built his first experimental steam traction engine , nicknamed " Old Betsy ". 28. However, it is included in this list because the traction engine is a direct descendant. 29. In stationary steam engines, traction engines and compound expansion. 30. Model traction engines , powered by steam, are manufactured by several companies, notably Mamod and Wilesco.
