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).
Rear shock absorbers, engine lubrication, and cylinder lubrication methods.
| Identifier | ExFiles\Box 181\M11\ img216 | |
| Date | 1st September 1919 | |
| To EH. from R.{Sir Henry Royce} -2- R4/G22/9/19 Contd. (8) The rear shock absorbers are a certain improvement, and should (if proved to be sound) be fitted at once. I have agreed to fitting them on the trials cars without the 10,000 miles certificate, and since they X3461 are not likely to cause any accident, provision should be made for fitting them on all cars, and the unsuitable tanks put into stock for repair cars. This class of shock damper is suitable for the rear of any car fitted with cantilever springs (i.e. spring naturally having less friction). With these fitted the springing can be slightly softer than our former standard, owing to the reduced oscillation resulting in less risk of bumping (but slightly too soft springs were fitted to 1 EX.) (9) Let the next car that you send be lubricated with Castrol. We assume that 49 GA is lubricated with Castrol, but the engine is still so tight, that any virtues in the castrol will not have been apparent. (10) Re cylinder lubrication, we are suggesting that current cars shall be sent out as pre-War, but with the extra oil valve pressed down with a special metal fitting, X3437 which can be easily removed if we find the practice bad, but it is highly desirable to have as much oil on pistons as possible for sweet running, freedom from piston noises and absence from wear. R.{Sir Henry Royce} | ||