two Class GH passenger train versions of its Class U Union Garratt in service, designed and built by Maffei, to work the named fast passenger trains of the era, the Union Express and Union Limited, forerunners of the Blue Train. They were superheated and had Walschaerts valve gear, bar frames and mechanical stokers. They made several trips working the two Union trains out of Cape Town, but they were not as successful as had been hoped and they were soon taken off that duty. Their mechanical stokers also proved to be troublesome and were eventually removed. Both remained in service until 1958. Spain Six Garratt locomotives of this wheel arrangement, built by Euskalduna in 1931, were used on the gauge Ferrocarril Central de Aragón (FCA) in Spain. They worked the heaviest passenger trains on the steepest gradients from Valencia to Zaragoza. After the FCA was integrated into Renfe in 1941, the locomotives were converted to oil-burners and worked in the Tarragona-Valencia section on the line between Barcelona and Seville, until they were replaced by diesel traction in 1967 and retired. References External links Garratt locomotives Whyte notation