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).
List of specifications and particulars for a Morris cork clutch.
| Identifier | ExFiles\Box 128\2\ scan0226 | |
| Date | 14th June 1934 | |
| Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}13/KW.14.6.34. Particulars of Cork Clutch - Morris. (1) Working coefficient of friction .192 (2) Unit pressure 19 lbs/sq.in. (3) Driven member dural .125 thick. (4) Pressure plate .4 carbon steel .250 thick. (5) Push off springs to separate driven member from flywheel 45 lbs. (6) Oil drained more easily on flywheel side so that this side runs drier than pressure plate. (7) Wear allowance before pedal reaches floorboards. .020. (8) 7/8" dia. corks inserted in 11/16" dia. holes. (9) For an engine giving 915 lbs. ins. torque they were using clutch of 4" mean radius with 33 sq.ins. of cork. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||