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).
Adhesion properties of RR.56 bearing metal compared to white metal during the bedding-in of Bentley crankshafts.
| Identifier | ExFiles\Box 131\4\ scan0008 | |
| Date | 9th January 1937 | |
| [Handwritten]: 11 3 HOTEL DE FRANCE. CHATEAUROUX. Indre. France. Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/IO/JAB. 9th January 1937 To. Rm.{William Robotham - Chief Engineer} Bentley. BEARINGS. With regard to RR.56 bearing metal. It has been pointed out to me that this metal very easily adheres to steel. While bedding in bearings, the Fitter had to constantly clean the crankshaft of the metal that had adhered to it. It sticks and pulls off like putty, whereas white metal has a gliding effect, and does not adhere to the shaft cheese how tight it is when bedding in. ------------------- [Signature] Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||