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).
Letter to Ferodo Ltd. regarding the despatch and testing procedures for Bentley axle tubes and various brake drums.
| Identifier | ExFiles\Box 141\1\ scan0095 | |
| Date | 25th January 1936 | |
| X1180 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/AFM.{Anthony F. Martindale}6/KW. 25th January, 1936. J.N. Longley, Esq., Chief Chemist, Messrs. Ferodo Ltd., Chapel-en-le-Frith. Dear Mr. Longley, I have arranged for the despatch to you of :- 1 Bentley Rear 1/2 Axle Tube complete with brake gear. 1 Standard Millenite Drum. 1 " Aluminium N.M.C. Drum. 1 " Millenite Drum with helical ribs. Sufficient rivets for two relinings of the shoes. The drums should slip straight on to the axle tube. They are a tight fit, but you will be able to see where the races lie on the tube, and you are at liberty to skim or emery the tube to your requirements. The millenite drums have standard hubs, but the aluminium drum has a special hub and if you are obliged to scrap this, will you please let me know so that I can order a replacement. All 3 drums have been skimmed up. May I again describe the tests I would like you to do: (1) Place standard millenite drum on rig and rotate it at 460 R.P.M. as nearly as possible (this corresponding to 40 M.P.H.), and adjust brake torque so that a steady temperature of 300°C. is attained by the drum without artificial cooling. | ||