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).
Proposed specification alterations for the C-14 Unit clutch following a 10,000-mile test.
| Identifier | ExFiles\Box 101\4\ scan0051 | |
| Date | 4th June 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} c. to By.{R.W. Bailey - Chief Engineer} <500cc Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}7/KW.4.6.35. Clutch for C-14 Unit - 21-G-IV 10,000 miles Test. We understand there is still some doubt about the specification of this clutch, and in view of the troubles experienced on Bentley production should in any case like to alter it. (1) The spring centre and driven member to be the Terraplane strengthened one as supplied as a replacement in B-10 unit, lined with FF1; the plate to have .015" set. (2) The back plate should have no float and be driven by square hardened pins. (3) Cover plate to N.Sch.4502. (4) Cartridges and fingers to N.Sch.4517. Will By.{R.W. Bailey - Chief Engineer} please let us have details of the last as soon as possible. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||