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).
Bentley clutch slip, wear allowances, and pressure loss.
| Identifier | ExFiles\Box 103\3\ scan0203 | |
| Date | 10th November 1938 | |
| To K/KC... from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}12/N.10.11.38. Bentley - Clutch. With regard to your query re clutch slip with plates half worn, I have taken the matter up with BY.{R.W. Bailey - Chief Engineer} and the following are the facts. The maximum allowance for wear is .035" on each face, total .070". Total deflection of spring is 1.000" under 1320 lbs load. With .070" wear off faces of clutch fabric the fall in pressure is only 7% and this is well covered in original leading figure (By) Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||