In 1913 The ‘Q’ Class traction engine was introduced, designed to be the ‘Rolls-Royce’ of General Purpose traction engines and five were sold in its first year.
Only 14 traction engines were produced between 1913 and 1920″.
They were sprung with something approaching automotive springs and fully lagged and had ring oiler bearings, Ross safety valves, feed water heaters, 180 psi for a single cylinder engine and had machine cut gears etc. They were only offered in 6hp size.