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).
Design, patent, and performance of split aluminium pistons invented by Mr. Bentley.
| Identifier | ExFiles\Box 77\1\ scan0017 | |
| Date | 3rd November 1919 | |
| To R.{Sir Henry Royce} from CJ. Copy to E.H. WOR.{Arthur Wormald - General Works Manager} EH. BP. X.3774 Re Split Aluminium Pistons. CJ17/E.3.11.19 Commander Briggs informed me to-day that Mr.Bentley, who was with the D.F.P. people and was subsequently an Admiralty officer under Commander Briggs, has invented and, he thinks, taken out a patent for split aluminium pistons. The skirt of the piston is towards its base thickened sufficiently to enable a ring to be fitted on the inside of the piston. The skirt of the piston is sawn upwards for about 3/4" in 6 places in the circumference. Commander Briggs has been told by Bentley that this arrangement has eliminated piston knocks and has shown a remarkable saving in oil consumption. Commander Briggs is doubtful as to whether Bentley has run these pistons sufficiently to be able to ascertain whether the aluminium fatigues to a dangerous extent. CJ. | ||