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).
Listing different Borg & Beck Ph.III clutch driven plates and their corresponding reference numbers and specifications.
| Identifier | ExFiles\Box 129\3\ scan0105 | |
| Date | 14th February 1936 | |
| X1110 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Smth.5/JH.14.2.36. Borg & Beck Ph.III Clutch Plates. The various Borg & Beck clutch driven plates which we have used in Ph.III have been given reference Nos., and we give them herewith for your records. No. 4. Plate at present in 33-EX; (No. 6 unit), moulded facings, no horse-shoe slots. No. 5. Plate going into 32-EX; (No. 9 unit) moulded horse-shoe slots. Borg & Beck specification Ex.44 No. 6. Plate in unit No. 11; as No. 5. No. 7. Plate going into 33-EX (No. 10 unit) compound cushion type with moulded facings. No. 8. Plate going into 34-EX. (No. 7 unit), as Nos. 5 and 6. to be fitted by Mx.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/Smth. | ||