Locomotive test report, British Railways London Midland Region Test Report No. 94

Locomotive test report, British Railways London Midland Region Test Report No. 94, Classes: 5P5F 4-6-0 No. 44757 (Caprotti valve gear - twin blast pipe), No. 44764 (Walschaert valve gear - single blast pipe), No. 44766 (Walschaert valve gear - twin blast pipe), No. 44767 (Stephenson valve gear - twin blast pipe), test for performance and efficiency of locomotives fitted with different valve gear, probably at Rugby, July and August 1949, 74 pages, 3 diagrams, 1 graph. (NRM Technical Archive reference TEST/LMS/16)