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).
Specification for the 35-EX steering assembly for a 10,000-mile test, including a sketch of the rocker-shaft pin.
| Identifier | ExFiles\Box 95\1\ scan0318 | |
| Date | 10th July 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} K350 Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}16/JH.10.7.36. 35-EX Steering. The following is the specification to which the steering of the above chassis should be built for 10,000 mile test. (1) Steering Cam at present fitted to 35-EX, i.e. 0.200 lead, and Timken bearings, to F.87835. (2) Standard production roller follower F.87552. (3) Mallable iron steering box. (4) Standard production steering wheel and column. (5) Steering controls incorporating Lec.4869. but with 0.020" - 0.023" clearance between the fitting on the stationary control tube and the cam tube instead of 0.010" - 0.012" as specified on the detailed drawings. (6) Special rockershaft pin without splines and 0.500 dia. as in the sketch below. Existing bearing races and rockershaft will clean up to take this 0.500" pin. [Drawing Text] Pin 0.500 Dia -¼ Races Bored To 0.500 Dia +¼ ROCKERSHAFT BORED To 0.500 Dia +1 | ||