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).
Engine wear after 45,000 miles, focusing on piston ring travel and comparing it to repair cases.
| Identifier | ExFiles\Box 5\1\ 01-page158 | |
| Date | 30th May 1933 | |
| X 5140. To Hd.{Mr Hayward/Mr Huddy} From Ha/Sn.{Mr Sanderson} c. E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} c. Da.{Bernard Day - Chassis Design} BP. c. MX.{John H Maddocks - Chief Proving Officer} Ha/Sn.{Mr Sanderson}4/KT.30.5.33. We have measured up one of our engines at the conclusion of 45,000 miles running. Naturally a lot of this running was done at high speeds and perhaps there was less starting and stopping than there would be if the car had been used by a customer. However, we should like to know how this wear compares with repair cars which pass through your hands. It will be noted that the majority of the wear takes place at the extreme top of the highest piston ring travel. Ha/Sn.{Mr Sanderson} | ||