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).
Comparison of torsional deflection and stiffness for various rocker shaft designs under a specific load.
| Identifier | ExFiles\Box 28\3\ Scan216 | |
| Date | 13th December 1935 | |
| Da{Bernard Day - Chassis Design}/AEC.1/HP.13.12.35. TORSIONAL DEFLECTION IN DEGREES OF PARALLEL PORTION OF ROCKER SHAFT ASSUMING A LOAD OF 1000 LBS ON END OF PENDULUM LEVER. Deflection. Percentage increase of stiffness over standard design. Standard R.R. Marles Rocker Shaft 1.125" diameter. 1.075 - Experimental Rocker Shaft 1.35" dia. as far as Needle Roller Bearing. .738 46% Suggested rocker shaft 1.300 dia. as far as Needle Roller Bearing. .790. 36% Suggested rocker shaft 1.300 dia. with plain bearing (N.Sch.4711). .677 59% Da{Bernard Day - Chassis Design}/AEC. | ||