The original engine had cylinders 9, 12, 16 and 25in. bores and a stroke of 21½in., which gave 250 h.p. at 160 r.p.m. with a boiler pressure of 200 p.s.i. The cut-off was regulated by a highly sensitive shaft governor and a change-over between the L.P. cylinder and surface condensor rendered it a non-condensing engine in the event of summer shortage of cooling water. For their time they were a comparatively compact engine for the rating and were designed for electricity generation (ref. Engineering, Jan. 1st, 1897).