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).
Summary of clutch experiment setups for various units.
| Identifier | ExFiles\Box 85\2\ scan0137 | |
| Date | 7th January 1935 | |
| L212 7.1.35. CLUTCH EXPERIMENTS. C-10 UNIT. New Clutch, M.M.20 Material. N.Sch.3948. 21-G-IV. C.14 UNIT. New Clutch, thin flywheel, fabric on pressure plates, no movement of back plate. .025 set in driven member. RAD.11. N.Sch.3948-4181. Plate saw-cut to Hs.{Lord Ernest Hives - Chair}1596. B-1 UNIT. Disc flywheel. B. & B. centre. 4-B-IV - B-7 UNIT. New clutch, thin light flywheel, fabric on driven member, .015 set. .005 movement of back plates. VM.20. 3-B-IV. B-9 UNIT. New Clutch, Donflex centre. B-10 UNIT. New clutch, R.R. B. & B. centre. No movement of back plate. VM.20. | ||