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).
Testing procedures for propellor shaft and suspension systems, including rig and road tests.
| Identifier | ExFiles\Box 155\2\ scan0274 | |
| Date | 22th November 1938 guessed | |
| -2- Gry.{Shadwell Grylls} Propellor Shaft. Road) Exactly as for the rear axle. Dyno) IMW.{Ivan M. Waller - Head of Chateauroux} The propellor shaft should be investigated for alignment, and road tested at maximum bottom gear torque at various loads, up to overload. AFM.{Anthony F. Martindale} Suspension. Rig Tests. All suspension pieces to stand 50 hours on bump rig (and the rest of the chassis also) except the springs and frame which should stand 100 hours on the 3" lift cams. The front suspension should also stand 25 hours on the brake torque rig at full brake load (2,000 lbs. on a Bentley). In order to help development the springs might be tested on a scragging machine instead of on the bump test. This is just as severe. The springs must stand 200,000 to 250,000 cycles on the apparatus. A shock damper test rig is being designed, as an alternative to endurance running, the severity of this rig is not yet known. This special development apparatus will both save time and development costs. Road Tests. After the 15,000 miles French tests, the car should be rebuilt and continue running for a further 30,000 to 50,000 miles under more normal touring conditions. The suspension should last the whole 50,000 miles, including rubbers and spring interleaving. IMW.{Ivan M. Waller - Head of Chateauroux} Tests of ride under varying conditions. Tests of wheels by deliberately hitting obstacles. | ||