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).
Experiments on extra cylinder lubrication to prevent piston seizure during cold starts on Bentley engines.
| Identifier | ExFiles\Box 86\1\ scan0102 | |
| Date | 2nd November 1934 | |
| X219 To E.{Mr Elliott - Chief Engineer} c. to HS.{Lord Ernest Hives - Chair} c. to Wor.{Arthur Wormald - General Works Manager} c. to Hy.{Tom Haldenby - Plant Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Hn.{F. C. Honeyman - Retail orders} c. to Mx.{John H Maddocks - Chief Proving Officer} Extra Cylinder Lubrication when starting from cold. These experiments were started owing to the several cases of piston seizure which have occurred on the Bentley. We have three lines of attack - (1) Solid Aerolite instead of the R.R. split skirt type pistons. Less wall pressure when starting from cold, now standardised. (2) Anodic treatment of the piston. This forms a hard surface on the aluminium face. We have such pistons on test treated by ourselves, and also by other people, but they are not yet sufficiently developed to run 10,000 miles. (3) Extra piston lubrication when starting up, which is the subject of the present report. 21-G-IV is so fitted and about to run 10,000 miles. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||