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 a scaled-down steering column and box on a Bentley chassis.
| Identifier | ExFiles\Box 87\5\ scan0131 | |
| Date | 23th November 1933 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X250 BY/HEB{H. Biraben}5/M.23.11.33. BENTLEY CHASSIS. STEERING COLUMN AND BOX SEC:7050. Please receive herewith information as requested for scaled down steering column on Bentley. Also one Blue Print of F.59831 with previous Steering Column figures for comparison.- LEAD. | .700 PITCH DIA: | 1.200 NO: OF STARTS. | 3 HELIX ANGLE. | 10° 30' ROCKING SHAFT. | 1.125 PEND: LEVER. | 7.500 SIDE STG:LEVER. | 7.735 LEVERAGE. | 10.4/1 TURNS OF WHEEL. | 1.99 LOCK ANGLES. | 39° R.H. 41° L.H. WHEEL & PEND:LEVER RATIO. | 9.35/1 BY/HEB.{H. Biraben} | ||