Puente de los Franceses (Madrid) railway line to the north, which began in 1856, by the "Compañía de los Caminos de Hierro del Norte de España". Puente de los Franceses (Madrid) The Puente de los Franceses (Bridge of the Frenchmen) railway viaduct is located in Madrid, Spain. Comprising five semi-circular brick skew arches, it was built in the second half of the 19th century to carry the railway line from the north (Madrid - Venta de Baños - Irun) across the River Manzanares. The bridge is named after the nationality of the engineers who devised the project, who were of French origin. The bridge is
Allison Engine Testing Stands section. The most prominent features of the six open engine testing stands constructed in 1942 are the six reinforced concrete walls which separated the testing stands and provided a degree of protection against excessive noise or a propeller malfunction. Stands 1 to 4, numbered from the north, have been constructed on a raised concrete platform above ground level. Parts of its flooring have been raised higher above the general level of the platform. They indicate the positions where each engine stand and its respective control cabin would have stood. Most of the remaining evidence of the purpose and working life