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).
Advantages and material specifications of Brico cylinder inserts for 4 1/4 litre engines.
| Identifier | ExFiles\Box 132\5\ scan0007 | |
| Date | 11th October 1938 | |
| 1124 To By.{R.W. Bailey - Chief Engineer} c. to Mx.{John H Maddocks - Chief Proving Officer} c. to Da.{Bernard Day - Chassis Design} c. to Da{Bernard Day - Chassis Design}/JNR.{Charles L. Jenner} c. to GWH.{George W. Hancock - Head Chateauroux} RM{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}9/JH.11.10.38. BRICO CYLINDER INSERTS. In accordance with a letter received from the British Piston Ring Co.Ltd. of Coventry, their representative Mr. W.J.McCarthy visited our works on October 7th. and He was shown a diagrammatic sketch representing piston rings in the bore of our 4¼ litre capacity engines. Regarding the Brico inserts, the following is the outcome of our conversation. Other firms who are using this insert are primarily interested in fitting them as a standard job to production engines because (a) It covers the portion of the bore where maximum wear takes place. (b) A high grade of wear resisting material can be used. (c) Advantage can be taken of using centrifugally cast material in conjunction with a sand cast block. Other firms fitting these inserts as standard practice are - Daimler (24 HP), Standard (12 HP) Commer, Cammel Laird. etc With reference to the material specification, two grades were mentioned - Chromidium Normal high grade, containing 1.0 - 1.2% Phosphorous 0.2% Chrome 0.2% Nickel. Hicrome Best Grade, containing 32% chrome and 0.6% Phosphorous. | ||