Parameters: Weight: 1,5 kg. A steam engine is a polytechnic model that represents a real steam engine model and works on the same principle.It can also be used to drive machine models. The machine is rotating in both directions. The furnace is fitted with a furnace with a steam boiler, fittings and a fraction with a steam cylinder and a timing and crank mechanism. The steam is supplied from the boiler through the inlet pipe. Only solid alcohol is used for heating.