Test data for various rear damper specifications at different speeds on two road surfaces.
| Identifier | Morton\M9\ img083 | |
| Date | 21th November 1931 guessed | |
| Time in secs. to complete 360° of the O.S. rear damper in an upward direction Specification of rear dampers. Speed in MPH. ROAD SURFACE "A" ROAD SURFACE "B" Outward direction Inward direction Outward direction Inward direction Damper loads 80/65. 10 190 192 1188 120.6 20 46.4 59 112.6 91.3 30 29.6 46 54.6 45 40 12.5 15.2 27.8 27 50 9 11.6 25 24 60 11.2 11.6 16.6 70 11 11 Damper loads 80/65 10 188.5 190.4 456 490 with .055 dia. hole 20 37 55 74 94 in H.P. valves. 30 22 25.2 41 71.6 40 14 16.8 22.2 37.2 50 9.2 10 17.2 27 60 13 19.5 70 12 12 Damper loads 10 368 384 1211 90/115 20 50 66 125.4 146 No holes 30 38 43 60 63.3 in 40 15 19 40.5 45.4 valves. 50 10.5 10.5 18.2 29.4 60 14.5 22 70 12 14.8 Road surface "A" = Canal Rd. (Sinfin Lane) "B" = Road on to Six Hills. | ||
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).