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).
List of anticipated spare parts and potential component failures for depots, comparing the 20 HP and 40/50 models.
| Identifier | ExFiles\Box 46\1\ Scan052 | |
| Date | 15th December 1922 guessed | |
| contd:- -2- 2. Main Bearings. It will be necessary to supply sets of under-size main bearings for Depots. 3. Nuts and worm for steering. We anticipate much less wear on the worm in the case of the 20 HP. compared with the 40/50 because the 20 HP. has a hardened worm. We think that a supply of nuts should be sent eff. out. 4. Drivers on the rear axle. Experience has proved that we are likely to have much less trouble with the drivers on the rear axle for the 20 HP. compared with the 40/50. This is chiefly owing to the difference in the axle control. 5. Shock absorber parts. We consider that the shock absorber joints will have a longer life than those on the 40/50 if they have reasonable attention. Parts which may possibly fail. 1. Spring for the Bendix Drive. We anticipate that a large percentage of these springs will break during the cars' life. 2. Top plate of front springs. We ought to allow a big percentage of these on cars going abroad, at least twice as many as we do on the 40/50. 3. Top leaves of rear springs. A supply of these should be sent to Depts. The proportion should be somewhere about the same as the present front springs. 4. Cylinder heads. We should anticipate a percentage of cylinder heads will be cracked. 5. Inlet and exhaust pipes. These are liable to crack. 6. Camshaft gear wheels. If the engines are run at very high speeds there is a danger of these failing. 7. Valves. We have had cases of burning. 8. Petrol tank filler caps. We have found these frequently get lost. HS.{Lord Ernest Hives - Chair} | ||