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).
Vibration and rattle experiments on engine X634 with an old type 'Coronation' crankshaft.
Identifier | ExFiles\Box 25\3\ Scan025 | |
Date | 23th September 1914 | |
ENGINE X634 Vibrations. 1649. old type crankshaft 6 lbs compression "Coronation" & Retard rattles Experiments. Result. Nº1 Balance weights fitted. | No difference " 2 Slipper wheel slacked off & tightened | When slack, comes in forward 45 mph also on gear. " 3. Balance weights taken off. | No diff. " 4 Slipper wheel right off. | Went to higher speed on retard same. " 5. Towed car on 2nd gear | Rattles same as running. " 6 Towed with rods & pistons off | V.G. run to 28 mph. on 1st Gear. 7 Pistons & rods fitted again | Rattles bad. " 8. Fitted with pistons weighing 1 lb 15 ozs. | V.G. not so good as shaft only " 9. Fitted with pistons 3 lbs 7 ozs. conver. | Rattles Bad. -> | ||