From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Axle movement test results comparing the efficiency of Telecontrol Hartford and R.R. Hydraulic shock dampers.
| Identifier | ExFiles\Box 151\2\ scan0199 | |
| Date | 1st March 1934 | |
| x4698 1.3.34 AXLE MOVEMENT TESTS - 22-EX. Tests carried out to determine the efficiency of Telecontrol Hartford Shock Dampers as compared with Governor Controlled Hydraulic R.R. Dampers. Speed throughout tests - 45 M.P.H. HARTFORD TELECONTROL DAMPERS. BUMP. REBOUND. Press. lbs. sq.in. | N.S. | O.S. | N.S. | O.S. 50 | 6.016 | 5.733 | 6.266 | 6.933 100 | 5.733 | 5.216 | 5.825 | 6.250 200 | 5.250 | 4.916 | 5.666 | 6.016 300 | 4.333 | 3.650 | 4.666 | 5.300 400 | 3.125 | 2.475 | 3.750 | 4.500 R.R. HYDRAULIC DAMPERS. BUMP. REBOUND. Press. lbs. sq.in. | N.S. | O.S. | N.S. | O.S. 10 | 5.466 | 5.350 | 5.466 | 5.883 15 | 4.983 | 4.758 | 4.800 | 5.400 20 | 4.183 | 3.916 | 4.583 | 5.100 25 | 3.616 | 3.200 | 3.666 | 4.466 30 | 2.600 | 2.287 | 3.266 | 4.050 35 | 2.550 | 2.083 | 3.266 | 4.000 40 | 2.066 | 1.583 | 3.116 | 3.716 43.5 | 1.366 | 1.533 | 3.016 | 3.266 Tests taken over Hunchback Bridge near Willington. | ||