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).
Specifications for modifying a clutch for a B-10 Unit.
| Identifier | ExFiles\Box 85\2\ scan0141 | |
| Date | 25th January 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} X212 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}14/KW.25.1.35. Clutch for B-10 Unit. Will you please remove from this unit the clutch at present fitted to N.Sch.4190, and fit an N.Sch.3948 clutch to the following specification - Flywheel to Hs.{Lord Ernest Hives - Chair}1416 removed from this unit recently. Inner pressure plate to have .012 movement, spring loaded with Hs.{Lord Ernest Hives - Chair}1355 springs. Total load to move plate 150 lbs. Driven member G.56666, saw cut to Hs.{Lord Ernest Hives - Chair}1596, not staggered, and lined with RAD exactly as on C-14 unit. Circular instead of square driving pins, EX.16038. Spline bearing in gun metal. Clutch spring drive to be deleted. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||