Livio Dante Porta was an Argentine steam locomotive engineer. He is particularly remembered for his innovative modifications to existing locomotive systems in order to obtain better performance and energy efficiency, and reduced pollution. He developed the Kylpor and Lempor exhaust systems. The Lemprex was under development at the time of his death.
Porta (centre, with dark cap and scarf) and engine crew in 1959
Ing.L.D.Porta, the FCAF 500 mm (19+3⁄4 in) gauge Garratt named in his honour
Argentina, his 1948 4-8-0
A compound locomotive is a steam locomotive which is powered by a compound engine, a type of steam engine where steam is expanded in two or more stages. The locomotive was only one application of compounding. Two and three stages were used in ships, for example.
Vauclain four-cylinder compound locomotive Milwaukee Road class A2 No. 919.
Cutaway view of the cylinders (low-pressure on left, high-pressure on right) and valves (above) on a tandem compound engine
Burrell road locomotive, showing high- and low-pressure cylinders.