Four-stroke diesel engine, Type IHD4, made by Crossley Brothers Ltd, Manchester, c.1960. Used at the Tameside Collecge of Technology for testing different engine loads.
'In order to improve performance of internal combustion engines, it is necessary to make a study of various aspects of their operation. Measurements are taken of cylinder pressure, cooling water flow and tempeature, exhaust gas temperature and fuel consumption. This information enables an assessment of power output and efficiency to be made. This engine, which by modern standards, runs at slow speeds, is instrumented to show how measurements were taken. A load, which acts as a brake, is applied to the engine by the weighted rope placed around the flywheel.' (Interpretation panel, c.1990s.